FIREARM

Description

[0001] The invention relates to a firearm according to claim 1.

[0002] Firearms are divided into two categories: handguns and handguns. Handguns are typically rifles, while handguns are pistols and revolvers.

[0003] A firearm is generally defined as a device that propels projectiles through a barrel, while firearms are firearms in which a projectile is propelled through or out of a barrel by means of hot gases. A distinction is made between automatic firearms, i.e., firearms that automatically re-fire after firing a shot; semi-automatic firearms, which automatically re-fire after firing a shot but require a new shot to be fired each time; repeating firearms; and single-shot firearms.

[0004] Firearms have been around for a long time. The following statements refer to so-called long guns, i.e., weapons whose bolt and barrel, when closed, have a length of 30 cm or more and which are 60 cm or longer in total.

[0005] Such firearms typically include hunting weapons, but also weapons for military, government, and police use. Firearms typically have at least a barrel and a breech. The barrel contains a chamber for holding a cartridge and an actual barrel profile, which serves to guide the projectile once it has left the cartridge case due to the ignition of the propellant. To stabilize the projectile during its flight to the point of impact, it is common practice to give it a rapid rotation around its longitudinal axis to achieve gyroscopic stabilization. In conventional firearms, this is achieved by having a barrel with a so-called rifled profile (rifled barrel) or a polygonal profile.

[0006] The bolt of a firearm serves to support the cartridge at the rear, ensuring that the cartridge remains in the chamber during firing and simultaneously providing a seal against gas pressure. The actual ignition device for the cartridge's primer, namely the firing pin or firing pin, is usually located in the bolt.

[0007] Depending on the design of the firearm, it may also have a permanently installed magazine or a magazine well for holding a magazine, whereby the magazine is capable of holding several cartridges, which are pushed out of the magazine and into the cartridge chamber by a forward and backward movement of the bolt from a front side of the bolt.

[0008] Depending on the firearm's design, the bolt ensures that the bolt is axially secured to support the cartridge during firing. The bolt is secured by engaging behind a barrel-side abutment or abutment in a device connecting the barrel to the cartridge case.

[0009] Firearms that feed cartridges from a magazine into the cartridge chamber typically have a so-called rotary bolt, which is initially retracted and, upon forward movement toward the chamber, entrains the cartridge and feeds it into the chamber. A rotating movement then initiates the rear grip. For this purpose, the shooter can actively rotate the bolt using a bolt handle in conventional repeating weapons, or the rotation of the bolt head in straight-pull rifles can be achieved using a control cam. Examples of repeating bolts include the Mauser system, and an example of a straight-pull bolt is the Swiss K31 system. Straight-pull bolts without rotation include, for example, the Blaser R93 / R8 system.

[0010] The basic design of firearms with a rotating bolt or rotating bolt head consists of a shoulder rest or stock from back to front, to which a bolt sleeve is attached. The bolt sleeve usually has a trigger mechanism at its shoulder-stock end for firing the shot, a magazine well or permanently installed magazine behind it, and further forward a locking device for the bolt or, in firearms where the bolt locks directly into the barrel, the barrel starting with the cartridge chamber. A front grip is often installed on or around the barrel, allowing the weapon to be gripped with one hand, while the other hand can usually be positioned in the shoulder stock area so that the trigger can be pulled with one finger.

[0011] Relative to the position of the firearm when fired, the receiver has an upper and lower receiver surface, as well as a receiver bridge at the rear and a receiver head at the front. The receiver bottom contains or accommodates the trigger mechanism and usually has a permanently installed magazine or a magazine well for a swing-in or plug-in magazine. Mounting devices for attaching an aiming aid, particularly a telescopic sight, can be mounted or are permanently installed on the upper surface. An ejection port for fired cartridges is usually located between the upper and lower surfaces of the receiver.

[0012] The bolt is mounted within the bolt sleeve, in particular mounted so as to be axially displaceable, and in conventional repeating weapons can be moved backwards out of the sleeve head of the bolt sleeve in the direction of the shoulder piece in order to retract the bolt head so far that the bolt head sweeps over a cartridge in the magazine in the backward movement and pushes it out of the magazine in the direction of the cartridge chamber with the bolt head, i.e. the front of the bolt, during the forward movement.

[0013] In automatic or fully automatic firearms in which the bolt is unlocked and moved back under the effect of recoil or due to the effect of hot powder gases on the one hand and the recoil on the other, and is moved back into the firing position by a recoil spring, the bolt sleeve is usually significantly longer due to its design and is not open to the rear.

[0014] When the shot is fired, the trigger mechanism is operated by the shooter, releasing a striker which usually strikes the firing pin on the rear of the bolt and moves it forward so that it actuates the primer, or the spring-loaded firing pin is released by pulling the trigger so that it is moved towards the primer under the action of the spring.

[0015] In both cases, the shot is fired and the bullet is driven through the barrel by the hot gases of the burning propellant.

[0016] In repeating weapons, the bolt head or the entire bolt is then rotated to unlock it. The fired cartridge case is grasped at its rear by a cartridge extractor located in the bolt head and extracted from the chamber. A cartridge ejector, usually located in the bolt or in the case, ejects the cartridge from the bolt the moment the cartridge is level with the ejection port and can be ejected. From this position, the bolt is usually pulled back slightly until a full cartridge is forced into the bolt's travel path, usually under the action of a magazine spring.

[0017] It should be noted that the cartridges in the magazine are usually held down by the bolt itself until the bolt releases the magazine well, allowing the cartridge to be pushed upwards. The bolt then moves forward, pushing the cartridge into the chamber, where it is secured by the bolt and, in particular, by the bolt engaging behind the bolt in the bolt abutment or directly in the barrel.

[0018] As already explained, the movement of the bolt can be achieved by a so-called bolt chamber stem or, in the case of fully automatic or semi-automatic weapons, by a control cam that acts between the bolt and the bolt head.

[0019] Examples of semi-automatic systems include the Browning BAR system, in which the bolt is unlocked by the hot powder gases and moved backward by the existing recoil impulse. The bolt's forward movement is then achieved by locking springs located beneath the barrel.

[0020] The overall length of a firearm is usually determined by the sequence of the trigger mechanism, or at least the firing mechanism, on the one hand, the subsequent magazine well and the subsequent locking area, in particular also due to the cartridge length and thus the magazine length of the cartridges to be fired.

[0021] WO 2019 / 139849 A1 discloses different magazine inserts for a firearm, which are supposed to make it possible to insert magazines for different cartridges into a magazine well without modifying it. This does not alter the rest of the weapon.

[0022] US 2017 / 299297 A1 discloses a bedding system for a firearm in which a modular bedding block is designed to be inserted into a recess in a weapon chassis. This is said to make it possible to use different repeating rifle systems in one weapon chassis.

[0023] The object of the invention is to create a high-precision firearm with high variability, short length and high safety.

[0024] The problem is solved with a firearm having the features of claim 1.

[0025] Further advantageous developments are identified in the dependent subclaims.

[0026] When we refer to a firearm from the front in the following, this means in the direction of fire or closer to the front or muzzle.

[0027] When we speak of rear or rearward in the following, this means against the direction of fire or further away from the muzzle.

[0028] When we refer to the top or upper side of the weapon in the following, we mean the side of the weapon that faces upward in a conventional shooting position. This is usually the side of a weapon that, when properly positioned, features aiming aids such as a telescopic sight, a reflex sight, or a rear sight, or the sight line.

[0029] When we refer to the bottom or underside of the weapon, this refers to the side that faces downwards in the correct or usual shooting position and usually contains the pistol grip, the trigger and the magazine well.

[0030] When we talk about the side in the following, this means, in a correct shooting position, the side of the weapon, such as the ejection windows for cartridges.

[0031] It is clear to the expert that this relationship also applies if the weapon is held differently, placed differently or is otherwise in a different spatial orientation.

[0032] The firearm according to the invention is designed in a departure from conventional constructions, with the firearm comprising, from rear to front, a shoulder stock, a magazine well, a trigger and safety device, as well as the barrel and a handle. In a departure from conventional designs, the lock and safety device are not mounted on the underside of the receiver, but on the top of the receiver, particularly opposite the magazine well, which significantly shortens the overall length. Both the safety and the trigger are operated in the conventional manner on the underside of the receiver, but with a separate handle or pistol grip, as is already common with so-called "bullpub" weapons. According to the invention, however, the movement of a safety slide and / or the actual trigger is transmitted to the top of the receiver.

[0033] In addition, the firearm according to the invention has a straight-pull repeating bolt with a bolt body and a bolt head, wherein the bolt head is positively controlled via a control cam and rotated relative to the bolt body.

[0034] The bolt can be operated manually as a straight-pull bolt or can be designed as a gas-pressure or recoil-loading bolt.

[0035] Furthermore, according to the invention, the ejection window can be provided on both sides of the bolt sleeve, wherein according to the invention the ejection direction can be adjusted on the bolt head via two laterally arranged extractor devices which can be activated alternatively.

[0036] According to the invention, the barrel is screwed into a barrel receptacle or fastened therein in another way, wherein the barrel receptacle additionally serves as the locking counterpart for the bolt head and is itself arranged in a receptacle via a quick-release fastener.

[0037] This arrangement leads to increased precision when firing, with the type of locking of the bolt in the barrel receiver being designed in such a way that the locking becomes stronger when pressure is applied.

[0038] Preferably, the locking sleeve is designed so that the shoulder rest is an integral part, wherein the shoulder rest or the end pad is pivotable so that both the bolt and the barrel and the barrel receiver can be removed from the locking sleeve to the rear.

[0039] Furthermore, the receiver or the entire weapon chassis is designed so that its length can be adjusted using simple tools, particularly in the area of ​​the magazine well. According to the invention, the magazine well has a guide and, if necessary, a magazine lock on a rear wall, so that magazines of different lengths, for example, from .223 Remington to .50 BMG caliber, can be accommodated after the length adjustment has been completed.

[0040] The locking sleeve or the entire weapon chassis has a corresponding wave-shaped engagement profile on the respective split and extendable components, which accordingly allows a stepped length adjustment, which also has the necessary stability to safely support even very heavy calibers and their recoil.

[0041] The invention thus relates to a firearm, in particular for firing cartridge ammunition, comprising at least one weapon chassis, a weapon system carrier and a weapon system device, wherein at least the weapon chassis and the weapon system carrier have gridded corresponding engagement means by means of which they can be arranged in axially different positions relative to one another.

[0042] Advantageously, the corresponding contours can be secured to one another by means of engagement means and connected with screw connections.

[0043] It is advantageous for the lock for firing and the safety for securing the lock to be arranged above the bolt track opposite the magazine well in the weapon system carrier.

[0044] To ensure good assembly and easy maintenance of the firearm, it is advantageous that the weapon chassis and / or the weapon system carrier and / or the weapon system device are designed to be split lengthwise and can be screwed together.

[0045] It is further advantageous that the magazine well on the weapon chassis is designed in such a way that a magazine holder for releasably holding a magazine is provided on a rear transverse edge of the magazine well and the magazine well is delimited at the front by a base plate which can be arranged in a grid on the weapon chassis via corresponding contours, wherein in order to change the length of the magazine well to adapt to different cartridge lengths, a shoulder rest device which is vertically displaceable and detachable is fixed axially on a holder on the weapon chassis on the one hand and arranges the weapon system carrier in an axially displaceable manner by means of corresponding contours.

[0046] Advantageously, the weapon chassis, the weapon system carrier and the weapon system device are arranged successively from bottom to top, wherein the shoulder rest device closes the weapon to the rear and rear top, above a bolt track, wherein the weapon chassis, the weapon system carrier and a pistol grip device, and the shoulder rest device each have the engagement contour, wherein the grids correspond to one another.

[0047] Furthermore, advantageously, at least one of the said components has a plurality of engagement contour elements arranged in a grid and formed transversely to the longitudinal extent, and a correspondingly gridded, correspondingly shaped contour is present on a further component.

[0048] It is advantageous if the contour has wave-shaped projections or wave-shaped double projections, both upwards and downwards, which are also offset from each other by half a grid, whereby these projections are wave-shaped or tooth-shaped.

[0049] In an advantageous further development, the engagement contour on the weapon chassis is formed twice, once facing the top side and once facing the underside, i.e. transversely to the longitudinal extent and offset from one another, with wave arrangements, wherein wave crests and wave troughs are arranged alternately on both the underside and the top side, wherein the wave troughs and wave crests on the top side and the wave troughs and wave crests on the underside are offset from one another in particular by half a wavelength such that transversely to the longitudinal axis a wave crest on the underside is aligned with a wave trough on the top side, wherein a curved web is present between the wave troughs of the top side and the underside, which are offset from one another.

[0050] It is also advantageous if the contour is formed in one piece from the material of the respective component of the firearm, or is formed as a rail and protrudes inwards or outwards by a desired amount, in particular protrudes 2 mm, wherein the distance between equal flanks of the wave crests is in particular 10 mm.

[0051] It is also advantageous if the wave crests and troughs are inclined from an outer side of the contour towards a wall of the respective component in such a way that in particular a 75° angle is formed, so that the contour widens away from the wall, in particular in the area of ​​the wave crests and at the base of the wave troughs inwards, i.e. away from the wall, so that the inclination of the contour in the area of ​​the wave crest and the wave troughs is the same, while in the area between the wave troughs and the wave crests the contour runs flat, so that it is ensured that a correspondingly shaped counter-contour is fitted or can be fitted in a form-fitting manner and also that in the case of a form-fitting connection between a counter-contour and a double-row contour, the form-fitting connection and rear engagement additionally reliably prevent pulling apart in the transverse direction.

[0052] In an advantageous embodiment, the widths of the respective components are adapted to one another in such a way that they can be plugged into one another in such a way that the corresponding contours can be brought into a positive fit.

[0053] Advantageously, in order to secure an arrangement of contours brought into positive engagement with one another against deflection upwards and / or downwards, a plurality of through holes are provided on the respective components from bottom to top, i.e. transversely to the longitudinal extent of the weapon, the axial spacing of which corresponds to the grid of the contour or is a multiple thereof, so that the respective parts having a contour can be screwed together via screw bolts passing through the holes.

[0054] It is also advantageous if fitting bolts are present on the respective parts, which are also arranged in the grid dimension of the contour, but preferably a multiple thereof, in order to ensure a defined fit before screwing, wherein the fitting bolts are arranged on the components in the area of ​​one or more bores, replacing them, and engage in a bore of the respective corresponding component.

[0055] The firearm locking system according to the invention is designed such that the actual components required for firing, such as the firing pin, mainspring, trigger rod, etc., are arranged above a bolt track, particularly opposite the magazine well. The bolt track is the track along which the bolt travels when it is moved rearward from the position closing the cartridge chamber and then moved forward again to feed a cartridge from a magazine inserted in the magazine well, inserting the cartridge into the cartridge chamber and closing the barrel rearward behind the cartridge chamber.

[0056] According to the invention, the safety mechanism is therefore also moved from the bottom to the top, whereby both the effect of the trigger and the effect of a safety slide are mechanically translated from the bottom to the top, around the bolt, the barrel or a barrel receiver.

[0057] The translation to the upper side is carried out with a lever which is curved, circular or in some other way and which is guided between the lower and upper sides and which is pivotally mounted on the upper or lower side.

[0058] According to the invention, the striker unit of the lock, i.e., the striker or a lever arm acting as the striker, and the associated lever elements, is designed as a toggle lever. When the striker or lever is moved into the cocked position, thus tensioning the striker spring, a trigger bar engages the striker or lever in a locking manner, with the trigger bar being pressed into the detent by the pressure of a spring.

[0059] The invention takes advantage, among other things, of the fact that a toggle lever has a dead center when fully extended. If it is pivoted in one direction or the other, it assumes a mechanically more stable state, from which it can only be moved past the dead center again by external influence.

[0060] According to the invention, the safety mechanism works in such a way that the striker's toggle mechanism and the mechanical parts connected to it are pushed upwards, counter to the direction of impact, which is a downward pivoting movement, and held there. Thus, the toggle lever is moved upwards past the dead center, counter to the direction of impact, and remains there in a mechanically stable position. Not only does the safety bar prevent the striker from moving toward the firing pin because its movement is blocked, but the special design of the toggle lever also ensures that any force acting on the striker acts in the exact opposite direction, i.e., away from the firing pin.

[0061] Thus, the invention creates a particularly secure safety device that is far superior to known safety systems and manual cocking systems. The invention therefore has the advantage of creating a simple, robust lock for a firearm, in particular a repeating firearm, which has a particularly reliable safety device and, due to its construction, is also very robust.

[0062] The invention thus also relates to a lock system for the firearm with an arrangement of at least two lever arms, wherein the lever arms are articulated to an axis or shaft in the manner of a toggle lever, wherein the toggle lever thus formed is pivotable on both sides of a dead center in which the arrangement is maximally stretched, wherein one of the lever arms is designed as a striking piece for a firing pin.

[0063] Advantageously, a pivoting direction on one side of the dead center closer to the firing pin defines a striking position and a pivoting direction to the other side of the dead center defines a safety position.

[0064] It is further preferred if the at least one lever arm acts on the axis of rotation under the pressure of a spring, so that the dead center must be overcome against the pressure of the spring.

[0065] It is also advantageous if, in the striking position, a lever with a detent is designed to interact releasably with a counter-detent or surface of a trigger bar.

[0066] In a further advantageous embodiment, the system comprising the lever arms is arranged on the top side of a weapon above a bolt track.

[0067] Advantageously, in order to translate a trigger movement on a trigger blade to a trigger rod arranged above the bolt track, a trigger transmission lever is provided which transmits the movement of a trigger slide, which is located on the underside of the weapon, to the top of the weapon, wherein the trigger transmission lever is arranged at a free end of the trigger rod diametrically opposite and is pivotally mounted there, and the trigger transmission lever is also pivotally mounted in the trigger slide on the underside of the weapon, wherein the trigger transmission lever is guided around the components located between the top and bottom of the weapon and / or a bolt track, so that a movement of a trigger slide in one axial direction is translated into an opposite axial movement of the trigger rod.

[0068] In a further advantageous manner, in a cocked, non-triggered position of the lock, the trigger bar engages with the underside of a free end in a detent or a detent recess in the cylindrical area of ​​one lever, wherein the underside of one end of the trigger bar acts as a counter-detent element for a flat detent surface formed by the recess and extending transversely, i.e. axially with the hammer rotation axis, so that the lock the lever arrangement against the pressure of a spring on a hammer bar, which is articulated to the other lever arm and is held by the trigger bar, when the surface of the trigger bar rests or rests on the surface of the lever.

[0069] Furthermore, it is advantageously possible for the trigger rod to be arranged to be movable axially into the locking engagement between the surfaces and axially out of the engagement, wherein the trigger rod is spring-loaded in the direction of the engagement, so that the release of the locking connection must take place against the pressure of a spring.

[0070] Advantageously, a safety device is also provided, the safety arrangement having a safety rod, the safety rod having means which are designed to cooperate with countermeasures of one of the levers, such that the means can pivot the toggle lever arrangement of the striking piece arrangement for securing from the striking position over the dead center into the safety position and for releasing from the safety position over the dead center into the striking position.

[0071] In one embodiment of the invention, the lock has a striking piece arrangement which has a striking piece and at least one striking piece actuating lever arm, wherein the striking piece is pivotable about a rotation axis towards and away from a firing pin and at least one striking piece actuating lever arm is articulated on the striking piece with a rotation axis, wherein the rotation axis is arranged on the striking piece away from the rotation axis, wherein the striking piece and the striking piece actuating lever arm form a toggle lever which is pivotable about the rotation axis on both sides of a dead center.

[0072] In a further embodiment of the invention, the safety means comprises two inclined surfaces which have a rectified inclination and the means on the striking piece arrangement is a laterally projecting pin, so that the striking piece arrangement moves the striking piece arrangement over the dead center into the safety position by the pin sliding along an inclined surface and when the safety bar is moved into the firing position, the inclined surface moves the pin and thus the striking piece arrangement from the safety position over the dead center into the firing position or striking position.

[0073] It is also advantageous that in the safety position, after pivoting over the dead center, the pin rests on the bottom of a groove in the safety rod, which blocks the path of the pin and thus the striking piece arrangement into the striking position.

[0074] In a further development, it is provided that the safety arrangement on the safety bar has an anti-rotation device for a firing pin arrangement or the breech of the firearm located on the safety arrangement, wherein the breech has a locking pin for this purpose and the safety bar has a latch, tab or pocket which, in the secured state, engages the safety pin or a direction of rotation in a locking manner.

[0075] Furthermore, it can advantageously be provided that a safety transmission lever is arranged on the safety bar in order to transmit the movement of a safety slide located on the underside of the weapon to the safety bar on the top side of the weapon, wherein the safety transmission lever is arranged at a free end of the safety bar and is pivotally mounted on the safety slide on the underside of the weapon, wherein the safety transmission lever is guided around the bolt and / or a cartridge chamber and / or other components or the bolt track and is pivotally mounted on the safety slide.

[0076] Advantageously, the trigger transmission lever and the safety transmission lever can be C-shaped, ring-shaped, clamp-shaped or shaped like a question mark.

[0077] In one embodiment, the toggle lever arrangement is formed by means of the hammer arm and the guide lever arm, wherein the hammer arm is an elongated component which is connected at one end to the hammer rod and the hammer arm is pivotable at its end about a rotation axis, wherein the rotation axis has two cheeks which are arranged at one end of the hammer rod and delimit the end between them and pass through the end, so that the hammer arm is rotatable about the axis or shaft.

[0078] Advantageously, an angled striking surface is provided at a diametrically opposite end of the hammer arm, wherein a guide rotary shaft is arranged at a distance from the end or from the striking surface to the end, which rotary shaft passes through the hammer arm, so that the free end of the hammer arm projecting beyond the shaft and having the striking surface forms the striking piece.

[0079] It is further advantageous if the hammer arm with the guide rotary shaft is rotatably arranged on the guide lever arm, wherein the guide lever arm is a plate-like element with two side surfaces, a top side and a bottom side as well as a front end region and a rear end region, wherein a receiving slot for receiving the hammer arm extends from the rear end region to the front end region over a partial length of the guide lever arm.

[0080] It is also advantageous if the hammer arm and the guide lever arm form the toggle lever arrangement, wherein the guide lever arm can be pivoted about laterally projecting shaft stubs and the hammer arm can be pivoted up and down about the shaft and both are connected to one another via the shaft, wherein the toggle lever arrangement formed from the hammer arm and the guide lever arm is subjected to spring pressure via the hammer rod and a hammer spring arranged around it, wherein the guide lever arm is fixedly arranged on the chassis of a firearm by the shaft stubs, if the hammer arm and the hammer rod are movable to a limited extent in the direction of fire against the direction of fire by pivoting the toggle lever arrangement.

[0081] In addition, it is advantageous if a recess is arranged in the guide lever arm from the front side, introduced from the underside, wherein the recess is designed such that it extends into the guide lever arm, wherein the recess has a recess roof towards the top, wherein the recess roof has a front region and a rear region, wherein the front region and the rear region are designed such that the recess roof has a front recess roof region and a rear recess roof region, which are arranged at an angle to one another and are designed in particular at an angle of 25° to 50° to one another.

[0082] In one embodiment, it is advantageous if a safety rod is provided for pivoting the guide lever arm and for bringing about a secured and an unsecured position, wherein the safety rod has a control bead at one end, wherein the bead is designed such that it is designed to cooperate with the recess and with the recess roof in a corresponding manner.

[0083] In addition, it can be advantageous if the toggle lever arrangement consisting of hammer arms and guide lever arms is in a secured position when the shaft is above the shaft stub and is in an unsecured ready-to-fire position when the shaft or its axis of rotation is below the shaft stub or its axis of rotation and in a knocked-off position when the rotary shaft or guide rotary shaft is below or completely below the shaft stub, whereby the hammer rod is arranged furthest forward in the direction of fire.

[0084] According to the invention, the firearm also has a breech which is designed as a rotating head breech, wherein corresponding engagement means are provided between a breech head and a breech head receptacle, which can be, for example, a barrel extension or directly the barrel in front of the cartridge chamber.

[0085] As corresponding engagement means, thread sections are provided which have a pitch or no pitch and are arranged one behind the other in a comb-like manner.

[0086] According to the invention, the locking thread is designed as a so-called buttress thread. Conventional buttress threads provide for one flank of the thread to be inclined in cross-section, while the second flank of the same thread to be radial in cross-section.

[0087] In contrast to this conventional design of a buttress thread, the closure thread according to the invention is designed as a buttress thread in which both flanks of the thread are inclined in the same direction in cross-section, but one of the threads in a pointed thread is more inclined than the other.

[0088] In particular, in the case of a pointed thread, the front flank in the weft direction is more inclined than the rear flank in the weft direction.

[0089] Due to the inclination of the rear flank, with a corresponding design of the corresponding internal thread of the barrel or barrel extension in the locked state, when a force is applied axially against the direction of fire on the bolt, the thread or both thread segments are pulled into each other by the interaction and thus the bolt effect is increased.

[0090] According to the invention, the buttress thread or the buttress thread segments of the closure can be designed as a pointed thread or trapezoidal thread.

[0091] The bolt head on the one hand and the barrel or barrel extension as bolt receptacle on the other hand can be designed with two, three or more thread segments and a corresponding number of smooth areas or cut-out areas.

[0092] According to the invention, within the closure, the part which causes a rotation of the closure head by an axial movement can also act with respect to a part which does not move axially relative to the closure head, a spring force such that the closure head is held in the locked state by the spring force or the closure head rotation into a closure head receptacle is carried out with spring support.

[0093] The advantage here is that a particularly easy and gentle repeating process can be carried out.

[0094] The invention, for example, provides for the further development of a bolt for a firearm and, among other things, combines a screw bolt with the features of a conventional rotary chamber or rotary head bolt in such a way that, while maximizing the safety of this locking system, easy loading, firing, and unloading of the rifle or firearm are possible. In principle, the invention allows for a direct operative connection between the bolt and the barrel, or between the bolt and a barrel extension that accommodates the barrel, and thus indirectly to the barrel.

[0095] By providing a bolt carrier and a bolt body that is movable on it and subject to axial spring pressure, as well as locking mechanisms between the bolt body and bolt head and bolt head shaft, it is possible to ensure particularly reliable function.

[0096] According to the invention, in order to vary the variability of a firearm with regard to the caliber selection both for the purchaser and during manufacture, a barrel extension is used in which the barrel is screwed into the substantially cylindrical barrel extension against the direction of fire, wherein an axial fixation is provided by an axial end of the receiving thread, from which the inner diameter of the barrel extension is preferably smaller, so that the screw-in end clearly defines the position of the barrel in the barrel extension.

[0097] In addition, the barrel extension as a bolt receptacle has, in a cylindrical region between the inner barrel receptacle and the receptacle for the cylinder bolt axially distant therefrom in the direction of fire, preferably at least one radial projection, a radial bolt spring, more preferably two or more axially successive bolt springs with an arc length of, for example, 180° relative to the circumference of the barrel extension, with which the barrel and the barrel extension can be inserted in the direction of fire into a receptacle or corresponding groove or grooves of a firearm and can be secured there by turning. For this purpose, the barrel extension is turned 180° into the corresponding bolt grooves in the receptacle when the barrel and the barrel extension are pushed into the receptacle from behind.

[0098] As is usual with twist locks, it is also necessary with the lock according to the invention that, in order to push the lock into a position in which it can be turned and thus locked, engagement elements and areas in which no engagement elements are present alternate.

[0099] Since the invention involves a screw cap, threaded areas must alternate with non-threaded areas. For example, there may be two diametrically opposed threaded areas and two smooth areas offset by 90°. This means that in the areas where there is no thread, i.e., the smooth areas, the cap head does not protrude beyond the smallest diameter of the thread at the base of the tooth.

[0100] With three or more locking areas, i.e., threaded areas, the angular offset between the threaded areas and the smooth areas is also always the same in a symmetrical arrangement, whereby an angle of 60°, or correspondingly smaller, is always maintained between the threaded areas and the smooth areas. This then also represents the so-called opening angle of the closure, since a rotation of the closure by 60° in the thread screwing direction up to the stop results in locking, and correspondingly, a rotation opposite to the screwing direction results in unlocking.

[0101] In the unlocked position, the smooth areas of the bolt head are positioned between two adjacent threaded areas in the area of ​​the corresponding thread of the bolt receptacle and can be moved axially back and forth within this area without engaging. The threaded areas of the bolt head are located in the smooth areas of the bolt receptacle, allowing axial movement here as well.

[0102] If the bolt head is in the forward-moving, most forward position possible, the threads of both the bolt head and the bolt receiver, which correspond to each other, can be brought into engagement by turning the bolt head clockwise until the threads of the bolt head and the bolt receiver, and thus the teeth of the threads, are completely screwed into each other.

[0103] Preferably, at least one stop surface is formed on the closure receptacle on the one hand and the rotating head on the other hand, which form a stop when the threads are completely screwed into one another, so that overtightening and thus unscrewing of the thread in a clockwise direction is blocked.

[0104] The above statements naturally apply equally to other possible means of intervention.

[0105] Accordingly, the invention also relates to a firearm with a locking system, comprising a locking receptacle and a lock, wherein the locking receptacle is formed as a hollow cylinder with at least one first radially inwardly projecting engagement means and at least one groove, wherein the groove is arranged axially adjacent to the first engagement means and a locking head which is formed with at least one second projecting engagement means and an adjacent axial groove, wherein the first engagement means of the locking receptacle and the second engagement means of the locking head are designed to engage in a corresponding manner, wherein the corresponding engagement means are designed as a thread with or without a pitch, wherein the respective threads each have at least one thread crest,wherein at least the rear flank of the at least one threaded ridge of the bolt head is inclined against the firing direction and the corresponding rear flank of the at least one threaded ridge of the bolt receptacle is inclined in the firing direction.

[0106] Advantageously, the thread crests can be designed as pointed or trapezoidal thread crests with inclined front flanks and inclined rear flanks.

[0107] In one embodiment, the front flanks and the rear flanks can have the same or different inclinations.

[0108] Furthermore, the threads can have a pitch, whereby the thread pitch of the thread crests is the same.

[0109] Furthermore, it is advantageous if the bolt head is rotatably mounted on a bolt carrier and, in addition, a bolt body is provided which is displaceable on a bolt head shaft of the bolt head and at least one compression spring is provided between the bolt body and the bolt carrier, which compression spring strives to move the bolt body in the direction of the bolt head, wherein means are provided on the bolt head shaft and on the bolt body which cause a rotation of the bolt head when the bolt body is displaced on the bolt head shaft.

[0110] In a further advantageous embodiment, the closure receptacle has one, two, three or more cylinder segments, each with a thread with thread crests, wherein grooves are arranged between the cylinder segments, wherein the grooves are arranged in the jacket wall of the closure receptacle from radially inside to radially outside and extend into the jacket wall at least as far as the bottoms of the thread crests or completely pass through the cylinder jacket wall.

[0111] In addition, it may be advantageous if one, two, three or more thread segments with thread crests are formed on the closure head, wherein grooves are present adjacent to the thread segments, which reach at least the depth of the bottoms of the thread crests, so that the grooves interrupt the thread helix of the thread crests.

[0112] Furthermore, it may be advantageous if the radial width of the grooves corresponds to the radial width of the thread segments and the radial width of the grooves of the locking head corresponds to the radial width of the cylinder segments.

[0113] According to the invention, the breechblock can also have the breechblock head, an adjoining breechblock head shaft extending axially against the firing direction, and a breechblock body arranged around the breechblock head shaft, wherein the breechblock body has means which mount it in a rotationally fixed manner in a firearm in an axially sliding manner, and furthermore a control link comprising a control recess and a control pin is formed between the breechblock body and the breechblock head shaft, which control link mounts the breechblock head shaft in the breechblock body in a limited manner.

[0114] It is also advantageous if the closure head has at least one thread ridge which is formed from a thread segment running into one of the grooves and spans the groove and forms a stop surface for a corresponding stop surface of a cylinder segment at its axial free end, so that when the thread ridges completely mesh with the thread ridges, further screwing of the thread ridges into the thread ridges and thus of the thread segments into the threads or the cylinder segments is blocked.

[0115] In the invention, the bolt receptacle is advantageously formed in a barrel extension, wherein the barrel extension is designed to receive the barrel of a firearm, wherein the barrel extension has a locking area in addition to the bolt locking area for receiving the bolt or the bolt head of the bolt, wherein at least one ring-segment-like projection is formed in the locking area, which is designed to interact with a corresponding groove in a sleeve or the chassis of a firearm and the cylinder jacket wall of the bolt receptacle or the barrel extension is designed to match the sleeve of a firearm.

[0116] According to the invention, it is provided that the bolt head shaft on the one hand and the bolt body on the other hand are advantageously mounted on the bolt carrier, wherein the bolt head shaft is mounted (rotatably but axially fixedly) on the bolt carrier, while the bolt body is fixed axially displaceably but rotationally fixedly on the bolt body.

[0117] In one embodiment, the bolt carrier is a bolt carrier plate and has two bolt carrier longitudinal support arms extending therefrom in the same direction as well as extractor arms extending from each of these, wherein the bolt carrier plate is a flat plate-like component which is designed to be upright with respect to the longitudinal extent of the bolt head shaft or in the firing direction and has a substantially rectangular cross-section, wherein the bolt carrier has a bearing opening for a bolt head shaft between narrow side edges of a lower edge of the bolt carrier plate, so that the bolt head shaft is arranged rotatably but axially fixed via a tongue and groove engagement on the bolt carrier plate.

[0118] In one embodiment, the closure body is a component that is essentially T-shaped in cross section, with a transversely running component region and a substantially upright component region, wherein the transversely running component region is plate-like with a rear end wall, two longitudinal side walls and a front end wall, wherein a lower wall is formed between the front and rear end walls and the longitudinal side walls, wherein the upright component region extends centrally downwards from a lower wall, with side walls that run parallel to the side walls, wherein the side walls are spaced substantially symmetrically from the side walls, wherein a bottom wall of the upright component region is formed between the end walls, wherein the bottom wall has a longitudinally central opening that is in the cylindrical bore,which is formed coaxially around the longitudinal axis of the bolt body and a bolt head shaft.

[0119] In an advantageous further development, in the inserted state of the breech body, a gap remains between the walls of the breech carrier longitudinal arms on the one hand and the lower wall of the transversely running component area of ​​the breech body on the other hand, wherein the bottom wall widens outwards beyond the side wall with a spring section and breech carrier longitudinal arm grooves are present in the breech carrier plate, wherein the projection of the spring elements over the side walls corresponds to the depth of the grooves, so that the elements are designed to be received in the groove correspondingly and the spring projections on the one hand and the grooves on the other hand form a tongue and groove system with which the breech body is arranged in the breech carrier so as to be longitudinally displaceable and sliding.

[0120] Furthermore, it is advantageous if a locking lever is mounted in the locking system in an upper ceiling surface of the bolt carrier, wherein the locking lever tilts about an axis of rotation into a slot, is arranged in such a way that a pawl extension, which is formed at one end of the locking lever, reaches into the region of a bore for mounting the bolt head shaft or can be pivoted in and out of this region of the bore, wherein the locking lever has an actuating lever which is loaded with a spring under spring pressure in such a way that the pawl extension is pivoted through the muzzle into the bore under spring pressure.

[0121] It is also advantageous if a first and a second locking groove are arranged in the bolt head shaft, wherein the first and second locking grooves are axial slots which are arranged in the surface of the bolt head shaft, wherein the first and second locking grooves are designed such that they can correspond with the pawl of the locking pawl of the locking lever, wherein the first and second locking grooves are designed to be axially offset from one another and radially offset from one another, wherein the second groove is further away from the bolt head than the first groove, but is arranged in front of the first groove in the direction of bolt rotation, wherein the axial distance between the grooves corresponds to the screw-in depth of the bolt threads into one another, while the radial distance corresponds to the arc length that the bolt travels in the screw-in movement until the end of the screw-in movement.

[0122] In an advantageous further development, the rotation of the closure head is brought about by a feed movement of the closure body, wherein the closure body slides onto the closure head shaft and the control pin, which rests in a control pin bore, slides along the control surface and forces the closure head to rotate to the right, wherein the control pin rests in an initial position in an axial formation of the control surface and, during a forward movement, the rotation of the closure head, wherein the inclined surface of the control surface is shaped such that the angular offset between the axial end regions of the control surface corresponds to the angular offset traveled by the closure head when fully screwed in.

[0123] One advantage of the invention is that the interaction of all components of the firearm results in a firearm that is, on the one hand, particularly short and compact and, on the other hand, particularly safe, particularly precise and has a breech that can withstand even very high gas pressures, so that this modular firearm concept according to the invention allows this firearm to be designed flexibly in smaller and medium calibers up to very large and even up to extra-heavy calibers, such as .50 BMG.

[0124] The invention is explained using a drawing as an example: Figure 1: A firearm according to the invention in a side view; Figure 2: The frame structure of the firearm in a side exploded view; Figure 3: The view according to Fig. 2 in a different length setting; Figure 4The view after Fig. 2 adapted for a large caliber; Figure 5The view after Fig. 2adapted for a small caliber; Figure 6 the firearm according to Figure 1 in a partially disassembled view; Figure 7 shows a perspective view of a receiver sleeve of the firearm; Figure 8 shows a perspective view of the fastening devices of a handguard and attachment device according to the invention; Figure 9 shows a highly schematic perspective view of the length adjustment of the firearm according to the invention; Figure 10 shows a cross-sectional view of the length adjustment according to Fig. 9 ; Figure 11 a partially sectioned perspective view of the length adjustment; Figure 12 a perspective view of the central element of the length adjustment; Figure 13 a perspective partially sectioned view of a detachable fastening device for the hand protection and attachment device and the receiving sleeve; Figure 14 a further perspective view of the device according to Fig. 13; Figure 15 a further exploded view of parts of the firearm; Figure 16 a partially sectioned view according to Fig. 15 ; Figure 17 the embodiment according to Figure 5 in a secured position; Figure 18 the embodiment according to Figure 6 in a perspective view; Figure 19 the embodiment according to Figure 8 in a perspective view from an obliquely opposite view; Figure 20 the embodiment according to Figure 11 in a view from below; Figure 21 the embodiment according to Figure 12 in a view, additionally showing parts of the breech in which the firing pin is mounted; Figure 22 the safety and guide lever of the embodiment according to Figure 5 in a view from below; Figure 23 the safety and guide lever of the embodiment according to Figure 5in a perspective view; Figure 24 closure head and shaft in a perspective view; Figure 25 a further embodiment of a closure according to the invention; Figure 26 the closure according to Figure 6 in cooperation with the closure receptacle; Figure 27 the closure according to the invention and the closure receptacle in a perspective view from below; Figure 28 a partially sectioned and cut-away view of the closure head and the closure head shaft in the closure receptacle; Figure 29 the arrangement according to Figure 9 in a perspective view from the opposite side; Figure 30 the arrangement according to Figure 9 and Figure 10 in another perspective view; Figure 31 the arrangement according to Figure 7 in the locked state in a partially sectioned view; Figure 32 a perspective view of a partially cut-out closure according to the invention with the lock of a weapon; Figure 33 the arrangement according to Figure 13in a perspective view of the bolt carrier; Figure 34 the bolt carrier according to the invention of the second embodiment; Figure 35 the bolt carrier and bolt body according to the invention according to the second embodiment; Figure 36 the arrangement according to Figure 16 in a front view; Figure 37 the closure body in a perspective view from below with a guide bar arranged thereon; Figure 38 the closure body with a guide bar and a guide rail arranged thereon; Figure 39 the arrangement according to Figure 21in a perspective side view with the bolt carrier; Figure 40 the complete bolt in a perspective view from the rear above; Figure 41 the bolt head, bolt head shaft and bolt body according to the invention in a perspective view from the front; Figure 42 the bolt body and the bolt head shaft and the bolt carrier arranged thereon; Figure 43 the bolt body according to the invention in a perspective view from below with the control pin and the locking pawl; Figure 44 the bolt head according to the invention and the bolt head shaft with the locking pawl according to the invention and the control pin in a perspective view from the side in the closed and locked position; and Figure 45 the arrangement according to Figure 31 in a perspective view from the rear in an open locked position.

[0125] The firearm 1 according to the invention has, in the firing direction from rear to front, a shoulder rest device 2, a weapon chassis 3, a weapon system carrier 4, a weapon system device 5, a locking system 101 and a lock system 350.

[0126] In addition, a hand protection and attachment device 6 is detachably arranged on the weapon system device 5.

[0127] Furthermore, a pistol grip device 7 is detachably arranged.

[0128] A magazine shaft 8, which is known per se, is provided at a short distance from the shoulder rest device 2, but which, according to the invention, has a magazine guide and holding device 9 at its rear end facing the shoulder rest device 2 in the firing direction.

[0129] The firearm 1 according to the invention is thus of modular construction, wherein the individual components and in particular the shoulder support device 2, the weapon chassis 3 as well as the weapon system carrier 4 and the pistol grip device 7 are mounted displaceably on one another in such a way that the weapon in its total length can be adapted to a magazine length ( Figures 2 to 5 ) is freely adjustable. The magazine well 8 can be extended by shifting the components relative to one another or by correspondingly extending the weapon. This is made possible in particular by the fact that a magazine holding and guiding device 9 is only present at the rear transverse limit of the magazine shaft 8, thus avoiding the complex assembly of a holding device that would have to be movable.

[0130] The weapon chassis 3, the weapon system carrier 4, and the weapon system device 5 are arranged in succession from bottom to top, with the shoulder rest device 2 closing the weapon to the rear and rear above a bolt track. The weapon chassis 3, the weapon system carrier 4, the pistol grip device 7, and the shoulder rest device 2 each have an engagement contour 10 that allows for a stepped length adjustment ( Figures 9 , 10 , 11 and 12 ).

[0131] The engagement contour 10 is designed in such a way that when the individual components 3, 4, 5 are joined together, even very high forces are reliably transmitted without allowing any longitudinal or transverse displacement of the components relative to one another.

[0132] For this purpose, the engagement contour 10 is formed twice on a central part, which in the present case is the weapon chassis 3, once pointing towards the top side and once pointing towards the underside as a wave arrangement 11 which is transverse to the longitudinal extent and offset from one another. In this case, wave crests 12 and wave troughs 13 are arranged alternately on both the underside and the top side, with the wave troughs 13 and wave crests 12 on the top side and the wave troughs 13 and wave crests 12 on the underside being offset from one another, in particular by half a wavelength, such that transversely to the longitudinal axis, a wave crest 12 on the underside is aligned with a wave trough 13 on the top side, with a web 14 being present between the wave troughs 13 on the top side and the underside, which are offset from one another.

[0133] This contour 10 is preferably machined from the material of the central part, here the weapon chassis 3 or alternatively the weapon system carrier 4, and protrudes inward by a desired amount. For example ( Figure 12 ) the contour protrudes by 2 mm, while the distance between equal flanks of the wave crests is 10 mm.

[0134] From an outer side 15 of the contour 10, the wave crests 12 and wave troughs 13 are inclined towards the wall 16 in such a way that, for example, a 75° angle is formed, so that the contour widens inwards, ie away from the wall 16, in particular in the region of the wave crests 17 and at the base of the wave troughs 13.

[0135] In other words, the inclination of the contour is the same in the area of ​​the wave peak 17 and the wave troughs 13, while preferably in the area between the wave troughs 13 and the wave peaks 17 the contour is flat.

[0136] This ensures that a correspondingly shaped counter-contour 10 is fitted or can be fitted in a form-fitting manner and, in addition, that in the case of a form-fitting between a counter-contour 10 and the double-row contour ( Figure 12 ) the form fit also reliably prevents pulling apart in the transverse direction.

[0137] In order to arrange the parts longitudinally adjustable to one another when the weapon chassis 3 has the double contour, the pistol grip assembly 7 and / or a corresponding base plate 50 (for the base closure between the magazine well 8 and the pistol grip device 7) on the one hand and the weapon system carrier 4 on the other hand have a corresponding counter contour on their outer surfaces 18, wherein these each only consist of wave crests 12 and wave troughs 13 without a corresponding double contour 10, as on the weapon chassis 3.

[0138] If the double contour is formed on the weapon system carrier 4, the weapon chassis 3 and the weapon system device 5 each have a corresponding counter-contour 10 on their outer surfaces 18, which each consist only of wave crests 12 and wave troughs 13 without a corresponding double contour, as on the component 4.

[0139] Accordingly, the widths of the respective components 3, 4, 5 and 7 are adapted to one another in such a way that they can be plugged into one another in such a way that the corresponding contours 10 can be brought into a positive fit.

[0140] In order to secure an arrangement of contours which are brought into positive engagement with one another against deflection upwards and / or downwards, a plurality of through-bores 41 are also provided on the respective components 3, 4, 5, 7, 50 from bottom to top, ie transversely to the longitudinal extent of the weapon 1, the axial spacing of which is the grid of the contour or a multiple thereof, so that the respective parts having a contour 10 can be screwed together via screw bolts (not shown) which pass through the bores 41.

[0141] If, for example, three parts, e.g. the pistol grip device 7, the weapon chassis 3 and the weapon system carrier 4 are connected to one another, the aligned bores 41 can be penetrated, in which case the screw connection freely penetrates the weapon chassis 3 and the force connection on the pistol grip device 7 and the weapon system carrier 4 takes place via the screw / nut or screw / counter thread pairing.

[0142] In addition, fitting bolts 40 can be provided on the respective parts 3, 4, 5, 7, 50. These bolts are also arranged in the grid spacing of the contour, but preferably a multiple thereof, to ensure a defined fit before screwing. The fitting bolts are thus arranged on the components in the area of ​​one or more bores 41, replacing them, and can engage in a bore 41 of the respective corresponding component.

[0143] The basic principle of length adjustment is that a plurality of engagement contours arranged in a grid transverse to the longitudinal extent is present on one component and a correspondingly gridded, correspondingly shaped contour is present on another component. This can be done, as in the specific embodiment according to the Figures 9 and 12wave-shaped projections or wave-shaped double projections, both upwards and downwards, which can also be offset from one another by half a grid (top to bottom), whereby these projections can be wave-shaped, as shown, but can also be tooth-shaped, as in gears or the like.

[0144] By means of such an arrangement, a shoulder rest device 2, a weapon chassis 3, a weapon system carrier 4, a weapon system device 5 as well as the pistol grip device 7 and a base plate 50 can be arranged removably displaceably with one another.

[0145] In particular, for example, the pistol grip device 7 can be freely arranged on the underside of a weapon chassis 3, so that together with a freely movable trigger a trigger length of, for example, 26 cm ( Figure 2 ) or 41 cm ( Fig. 3) is freely adjustable. This allows the weapon to be optimally adapted to the shooter's size.

[0146] In addition, it is possible to set the corresponding magazine length ( Figures 4 , 5 ) accordingly and thus adapt the weapon to different calibers.

[0147] In addition, the firearm 1 according to the invention has a receiving sleeve 20 for a barrel extension 104, wherein the receiving sleeve 20 is designed as a clamping sleeve, and a barrel 21.

[0148] The receiving sleeve 20 is in particular octagonal and has, in a region opposite the firing direction, corresponding engagement means for receiving counter-engagement means of the barrel extension, as will be described later.

[0149] In addition, the receiving sleeve 20 has a receiving area 22 for a hand protection and attachment device 6 to be attached.

[0150] The receiving area 22 for a handguard and attachment device 6 also has an octagonal cross-section, whereby this octagonal cross-section is smaller in extent than the remaining cross-section of the barrel receiver, so that the barrel receiver tapers with a step 23 towards the receiving area 22. The handguard is also octagonal in shape and its inner diameter is dimensioned such that it can be pushed axially over the receiving area 22 with a form-fitting fit until it abuts the step 23. The receiving area 22 orthe hand guard and attachment device 6 have a so-called M-LOK system known per se, in which elongated recesses are provided in each of the eight surfaces of the hand guard and attachment device 6, axially following one another in a grid predetermined by M-LOK, and in the receiving area 22 there are receiving areas 24 for receiving M-LOK locking blocks 25, which in particular have two screw holes and a groove 26 for receiving a fixing projection of the fastening block 25.

[0151] Instead of the conventional M-LOK system, all other corresponding systems with other hole shapes, such as the Key-MOD system, are also suitable. For the secure, unshakeable fit of the handguard and attachment device 6, the polygonal, particularly octagonal, cross-section is crucial, not the hole shape. In principle, any cross-section shape other than 90 degrees is conceivable, since a 90-degree angle does not allow for cross-locking. Thus, triangular, pentagonal, and polygonal cross-sections work.

[0152] It has been found that the arrangement of three fastening stones 25 in succession radially ensures sufficient fixation of the handguard and attachment device 6, so that aiming devices arranged on the handguard and attachment device 6, such as telescopic sights, which are in particular attached to a Picatinny rail fastened via the M-LOK system, are sufficiently and stable so that a shift in the point of impact does not occur when removing and attaching them, and also when firing the heaviest calibers.

[0153] The receiving sleeve 20 and thus also the barrel 21 and the handguard and attachment device 6 are arranged on the weapon system carrier 4, wherein a transverse groove 27 is provided in the weapon system carrier 4 for securing purposes and a locking hook or securing hook 28 is provided on the receiving sleeve 20 in the firing direction and below the barrel receiver 104.

[0154] In addition, the receiving sleeve 20 has on its underside a lower surface of the octagonal contour extending as a projection and having the fixing hook 28 on the back, a fastening projection 29 which extends from the fixing hook 28 in the firing direction to just before the step 23 and has, for example, four transversely running bores through which, for example, extend into the weapon system carrier 4 and through which, with screw bolts (not shown), both the clamping of the barrel extension 104 and, in one embodiment, the fastening and axial fixing of the receiving sleeve 20 to the weapon system carrier 4 takes place.

[0155] In a further advantageous embodiment of the invention ( Figure 7 , 8), the bores 30 are used to accommodate the screws that effect the clamping (not shown), while the securing of the receiving sleeve 20 is effected indirectly via the handguard and attachment device 6, which is effected by means of radially outwardly movable fastening blocks 31. In this case, the handguard can, for example, also be arranged with eight fastening blocks 25 in the area of ​​the receiving area 22, so that all M-LOK recesses in this area are locked.

[0156] The radially movable fastening blocks 31 are accordingly located in front of the receiving area 22 and are arranged radially movable on the weapon system carrier 4 and positioned such that they are preferably arranged to engage in the lower three adjacent openings 32 according to the M-LOK system on the handguard and attachment device 6.

[0157] The radially movable mounting blocks 31 are arranged in the weapon system carrier 4 in a radially movable and guided manner, with two guide tabs 33 extending outward and upward from a central radially movable mounting block 31, corresponding to the angle of the support for the handguard and attachment device 6, transversely to the longitudinal extent of the weapon 1. The central radially movable mounting block 31 also has guide pins 34, with which it is fixed in guide grooves 35 of the weapon system carrier 4 for oblique sliding movement.

[0158] A thrust bolt 36 is provided, acting axially on a narrow side of the central, radially movable fastening block 31, which is in particular under spring pressure and holds the central, radially movable fastening block 31 in a position maximally lifted out of its groove 32.

[0159] The adjacent peripheral, radially movable fastening blocks 31 have an opening 37 with which they can slide on the guide plates 33 in order to compensate for an axial movement of the guide plates 33 by the sliding of the guide pins 34 in the guide grooves 35 lengthwise and to ensure mobility.

[0160] The pressure bolt 36 or at least the central radially movable fastening block 31 are movable from the outside in such a way that by pressure against the spring-loaded pressure bolt 36 the central movable fastening block 31 and its adjacent peripheral radially movable fastening blocks 31 can be lowered into their respective grooves to ensure that they release the hand protection and attachment device 6.

[0161] The locking system 101 of the firearm 1 according to the invention has at least one locking receptacle 102 and a locking head 125.

[0162] The bolt receptacle 102 can be formed in the insertion direction of a cartridge before the cartridge chamber on a barrel for a firearm 1 or can be arranged in a barrel extension 104.

[0163] The barrel extension 104 according to the invention is a cylindrical, sleeve-shaped component which has a front opening 105 in the firing direction and a rear opening 106 in the firing direction. Viewed from the front opening 105, the barrel extension 104 has a thread 107 for screwing in a barrel, which corresponds to and matches a conventional external barrel thread. A smooth area 108 can adjoin the threaded area 107 against the firing direction, wherein the smooth area 108 has a diameter that corresponds to the inner diameter of the thread 107 and thus reduces the inner diameter of the barrel extension 104. This area usually serves to accommodate the smooth end area of ​​a barrel viewed against the firing direction. The smooth area 108 ends against the firing direction with a stop 109, against which a barrel then rests on the cartridge chamber side.

[0164] The bolt locking area 110 then follows, facing away from the firing direction. The bolt locking area 110 has three cylinder segments 111 extending rearward, i.e., away from the firing direction, which, on the outside, continue the jacket wall 112 of the barrel extension 104 or a barrel.

[0165] The cylinder segments 111 are arranged symmetrically to one another, for example, and accordingly, at an angle of 60° to one another. Accordingly, the cylinder segments 111 define grooves 114 radially between them, with the grooves 114 also being arranged offset from one another by 60°. Axial ends of the cylinder segments 111 are end walls 115, with the end walls 115 preferably being axially at the same height.

[0166] A thread 116 is formed on the inside of the cylinder segments 111. The thread 116 is consequently designed as an internal thread and, in particular, according to the invention, as a buttress thread, in which both flanks 118, 119 of a thread crest 117 are formed with a substantially identical inclination such that the respective thread crests 117 appear inclined in the weft direction by an inclined front flank 118 and an inclined rear flank 119. The respective cylinder segments 111 continue the thread 116, so that the thread 116 or the thread helix would be continuous without the grooves 114. According to Figure 24 The thread crests 117 are designed as a mixture between a trapezoid and a pointed thread as a pointed thread with flattened tooth tips or thread crest edges.

[0167] In the weft direction, in front of the thread 116, the cylinder segments 111 have smooth areas 120 of axially different lengths. The smooth areas 120 are designed as the inner walls of the cylinder segments and, viewed axially, are located at the level of the thread root, so that the thread turns protrude inward from this. Since the thread 116 on the cylinder segments 111 is designed as a continuous thread interrupted only by the grooves 114, the areas 120 have axially different lengths.

[0168] Accordingly, the thread crests 117 are also formed axially differently on the individual cylinder segments 111, so that, for example, on one cylinder segment 111, the thread crests 117 begin directly adjacent to the end wall 115, while on other cylinder segments 111, in particular a cylinder segment 111a, a smooth region 121 is formed adjacent to the end wall 115, which protrudes radially inward by the same amount as the thread crests 117. This smooth region 121, which protrudes radially inward, forms an axial stop surface 122 in the direction of thread insertion.

[0169] The cylinder segments 111 can be identical in terms of their radial width or arc length, but the cylinder segments 111 can also have different widths, so that in this case the grooves 114 are not evenly offset from each other by 60°, but rather, for example, two grooves 114 are offset from each other by a smaller angle. Accordingly, the thread crests 117 can also have different lengths depending on the cylinder segment 111.

[0170] Furthermore, the cylinder segments 111 can be formed without separating grooves in between, so that the jacket wall 112 of the barrel extension 104 is formed continuously, but axial grooves 114 are then introduced into the jacket wall 112 of the barrel extension 104 in such a way that the threads of the bolt, which will be described later, can slide along these areas.

[0171] The bolt 103 has a bolt head 125 and a bolt head shaft 126, which can be formed integrally with one another, for example. The bolt head 125 and the bolt head shaft 126 have an axial through-bore for receiving a firing pin and a firing pin spring. The bolt head 125 forms a breech face 127 on the front side, which has a through-bore 129 for a firing pin tip 130 in the center.

[0172] In addition, the bolt 103 has a bolt body 133 that surrounds the bolt head shaft 126 and thus has a central bore 134 in which the bolt head shaft is rotatably mounted. The bolt body 133 is mounted in a sleeve or chassis of the weapon 1 in a rotationally fixed manner, so that rotation between the bolt head shaft 126 and the bolt body 133 is only possible through the bolt head shaft 126 in the bolt body 133.

[0173] In order to ensure a defined rotation, a control cam is provided in the closure head shaft 126 in a manner known per se as a control surface of a lateral control recess 135 ( Fig. 5 , 29-32 ) is present. The control recess 135 is penetrated by or interacts with a control pin 136, which is arranged axially on the bolt head shaft 126 in the bolt body 133, adjacent to the control surface 135.

[0174] The control recess 135 has at its axially front end an initially axially extending region 138 which has an axial length corresponding at least to the diameter of the control pin 136 and then merges into an oblique region 139 which is inclined relative to the longitudinal axis up to an axially rear stop region 140.

[0175] The inclination of the control recess 135 in the oblique region 139 is designed such that a displacement of the closure body 133 axially forwards leads to the control pin 136 coming out of the axial region 138 of the control recess 135 and being moved along the oblique region in a sliding manner, thereby causing a rotation in the firing direction to the right in the case shown.

[0176] The radial path length of the control pin 136 in the control recess 135, ie from an axial region 138 to the rear axial stop region 140, is selected such that it essentially corresponds to the radial screw-in depth of the threads 116 of the cylinder segments 111.

[0177] This means that the radial length or displacement of the control pin 136 corresponds to 60° for three symmetrical cylinder segments 111, 90° for two cylinder segments 111, and 45° for four cylinder segments 111. The axial length of the control recess 135 is selected such that, on the one hand, only a reasonable amount of force is required for rotation, and, on the other hand, the bolt repeating travel is only minimally extended. In the open state of the bolt system 101, a front edge 141 of the bolt body 133 is spaced from a rear edge 142 of the bolt head 125 by approximately the axial length of the control recess 135 and, after the control pin 136 has moved from the axial region 138 via the control recess 135 or its inclined region into the axially rear stop region, is preferably still slightly spaced from the bolt head 125.

[0178] The control recess 135 and the control pin 136 can also be arranged in the opposite direction on the components of the bolt head shaft 126 and the bolt body 133, so that the control recess 135 is arranged in the bolt head shaft 126 and the control pin 136 in the bolt body 133. It is essential that a defined rotation of the bolt head 125 or the bolt head shaft 126 in the bolt body 133 is ensured by means of a control pin 136 and a control recess 135.

[0179] In order to produce a rotary lock between the closure head 125 and the closure receptacle 102, the closure head 125 has thread segments 144 corresponding to the threads 116 or thread crests 117 of the cylinder segments 111. The thread segments 144 are thus designed as external threads, wherein grooves 145 are formed between the thread segments 144 in a corresponding manner to the threads 116, the groove bottoms of which extend to the thread bottoms between the thread crests 146 or are inserted deeper. The individual thread crests 146 each have a front flank 147 and a rear flank 148. The front flank 147 and the rear flank 148 can be inclined according to the invention and correspond in their inclination to the inclination of the front flank 119 and the rear flank 118 of the threads 117 of the cylinder segments 111.

[0180] This means that when the bolt head 125 is pulled out of the barrel receiver 102, the individual threaded ridges 117, 146 are pulled into each other due to the inclined planes.

[0181] The bolt head 125 and the bolt head shaft 126 have, in the area of ​​a groove 145, a continuous axial groove 149 for a cartridge ejector (not shown), which, when a cartridge is extracted from the cartridge chamber with the aid of the bolt head 125 when the bolt 103 is retracted, plunges into the groove 149 and reaches the breech face, where it presses on the cartridge face in a manner known per se, thus transporting the cartridge out of an ejection port of a weapon.

[0182] Alternatively, a spring-loaded ejector installed directly in the breech face 151 of the bolt head 125 can be used to eject the cartridge case.

[0183] The thread crests 146 of the thread segments 144 of the closure head 125 correspond to a continuous thread helix, but interrupted by the grooves 145, wherein on a thread segment 144 of the closure head 125 one or two thread turns adjacent to a rear edge 142 of the closure head 125 protrude into a groove 145 leading in the direction of rotation and form a stop surface 152 in order to form a radial screwing stop in cooperation with a stop surface 122 of the closure receptacle 102.

[0184] In particular, several threads are superimposed on both the closure head 125 and the closure receptacle 102, forming a multi-row thread helix. For example, three threads are superimposed, forming a three-row thread helix.

[0185] Since the thread segments 144, like the threads 116 of the bolt receptacle 102, are part of a single-row or multi-row thread helix, they are formed differently on the individual thread segments 144, so that smooth areas 150 are formed adjacent to a breech face 151, which on the one hand project beyond the breech face 151 and thus guide the cartridge radially, and on the other hand correspond in their respective axial and radial extent to the smooth areas 121 and rest against the breech face 103 when it is closed.

[0186] The groove bottoms of the grooves 145 can be flat or curved according to the cylindrical curvature of the closure head 125.

[0187] The following describes first the general interaction of the closure head 125 and the closure locking area 110 according to the embodiment of the Figures 24 to 27explained. The bolt 103, with the bolt body 133, the bolt head shaft 126 therein, and the bolt head 125, is pushed toward the locking area 110. In doing so, the grooves 145 of the bolt head 125 move into the area of ​​the cylinder segments 111, and the threaded segments 144 of the bolt head 125 move into the area of ​​the grooves 114 between the cylinder segments 111.

[0188] The grooves 114 on the one hand and the grooves 145 on the other hand are dimensioned such that from this point on, the bolt head 125 is guided axially and an axial sliding movement between the bolt locking area 110 and the bolt head 125 is possible. Axial insertion is possible until the front flank 147 of the thread ridge or the front thread ridge, which projects into a groove 145, rests against an end wall 115. This blocks a purely axial movement of the bolt head 125 in the bolt locking area 110. As a result of this blockage, the control pin 136 is now displaced axially forward in or on the control recess 135, whereby the control pin 136 rotates the bolt head shaft 126 in accordance with its sliding along the control recess 135.As a result of this rotation, the thread crests 146 of the thread segments 144 now move between the thread crests 117 of the threads 116, so that a screwing thread engagement of all thread crests 117, 146 takes place simultaneously.

[0189] After a corresponding rotation of 60° (with three cylinder segments 111 and three thread segments 144), the threaded ridge 151 or several of them projecting into the groove 145 strikes the stop surface 122 with a radially front edge 152, thus stopping the radial movement. In this state, the bolt head 125 is screwed into the bolt locking area 110 and preferably only a slight axial movement of the control pin 136 into the axial area 138 of the control recess 135 is possible.This further axial movement of the control pin 136 into the axial region 138 of the control recess 135 brings about a form of radial fixing of the bolt head 125, because since the bolt body 133 is mounted in a rotationally fixed manner in a sleeve or on a chassis 3 of the firearm 1, the engagement of the control pin 136 in the axial region 138 now also fixes the bolt head 125 in a rotationally fixed manner in a first manner, so that without actively retracting the bolt body 133, it is not possible to unscrew the bolt head 125 from the bolt locking region 110.

[0190] Typically, at least one compression spring, mounted between the breech body 133 and a breech carrier 160, also acts on the breech body 133, so that the control pin 136 is pressed into the axial region 138 under the spring force. This will be described in more detail later.

[0191] This spring force preferably acts only in the area of ​​axial movement of the bolt head 125, within the bolt receptacle 102, i.e., as long as the threads 116, 144 are located in the grooves 114, 145. The spring thereby assists the "finding" and screwing of the threads 116, 144 into each other. In the axial movement range of the bolt head 125, in which it is fully rotated into its unlocked rotational position outside the bolt receptacle 102, the rotational movement of the bolt head shaft 126 is blocked by an acting, controlled locking pawl 241, which can engage in locking grooves 153, 154 in the bolt head shaft 126, thereby neutralizing the spring force.

[0192] This arrangement ensures that the bolt head 125, as soon as it can be screwed into the barrel extension, automatically rotates toward full locking. On the other hand, as soon as the bolt head 125 has been fully moved into the unlocked rotational position by the reloading process, this spring force no longer affects the rotational movement of the bolt head 125 and the further reloading path. Even in the event of recoil triggered by firing a shot, this recoil acts against the extension direction of the control pin 136 from the axial area 138, thus counteracting an unintentional, partial rotation of the bolt head 125 out of the bolt locking area 110, and the bolt 103 is automatically and fully locked.

[0193] The locking pawl 241, which neutralizes the spring force acting on the rotational movement, can also preferably be controlled from the outside in the fully locked rotational position of the bolt head 125 to prevent an unintentional opening of the bolt by engaging in the locking groove 153, for example during transport of the weapon.

[0194] For this purpose, the locking pawl 241 is preferably controlled via the mechanical safety of the weapon 1, which can be operated by the shooter, or is designed separately. Since this bolt lock acts directly on the bolt head 125, the locked engagement means, such as a bolt thread, directly prevent any axial movement of the bolt 103 against the firing direction.

[0195] For the surface contact and the axial guidance, even if it is possible according to the invention to enable a direct locking of the bolt head 125 in a correspondingly shaped bolt locking area 110 of a barrel end in front of the cartridge chamber, it is preferred that the bolt system 101 forms a lock between a bolt head 125 of a bolt 103 and a bolt receptacle 102, wherein the bolt receptacle 102 is designed as a barrel extension 104 or barrel receptacle for the barrel of a firearm 1.

[0196] For this purpose, the bolt receptacle 102, as already explained, is formed on the inside with a barrel thread. The barrel receptacle 104 according to the invention additionally has at least one or more ring-segment-like projections 155 on an outer circumferential surface 112, in particular three ring-segment-like projections 155, which are arranged axially one after the other.

[0197] These projections 155 serve to engage in correspondingly designed grooves (not shown) of a corresponding receiving sleeve 20 of a firearm 1. The jacket wall 112 of the barrel extension 104 or barrel receptacle 104 on the one hand and the projections 155 on the other hand ensure a long cylindrical guide in a corresponding hollow cylindrical receptacle (not shown) and the projections 155 ensure correspondingly precise and durable axial fixing. The receiving sleeve 20 for the barrel extension 104 is preferably a clamping sleeve. The ring segments serve as a type of locking lugs, whereby these have an arc length of preferably somewhat less than 180°. Here, it is provided that both the bolt receptacle 102 orThe barrel extension 104, with a barrel 21 screwed into it, is inserted into the corresponding receiving sleeve 20, which is designed in particular as a clamping sleeve, of a firearm 1 in the firing direction and then rotated by 180° until the ring segments are completely located in the corresponding grooves. Subsequently, a corresponding clamping can be effected, so that a fixation is achieved in every spatial direction.

[0198] Due to the installation direction of the barrel 21 / barrel extension 104 from the rear in the direction of fire, it is possible to design any attachments to the weapon, such as the handguard or fore-end, in accordance with the shape of the barrel contour, in contrast to the state of the art of systems with an installation direction from the front into the weapon against the direction of fire, which require the largest cross-sectional area of ​​the barrel as the minimum free space around the barrel.

[0199] This is particularly the case with the current state of the art of accessory mountings where mounting parts such as screws protrude radially inwards towards the barrel and therefore either have to be removed from the system before the barrel is removed, or where the attachment points [handguard tube] require a correspondingly additional cross-sectional enlargement with a concomitant enlargement of the weapon.

[0200] According to the invention, it has been found that in systems with axially tensioned barrels / barrel extensions, the axial tensioning force is not sufficient to prevent an unwanted axial movement against the direction of fire due to the recoil force, and on the other hand the frictional force of the bullet on the barrel in the direction of fire, which predominates towards the end of the bullet's passage through the barrel, causes a movement of the barrel / barrel extension in the direction of fire, which leads to unwanted changes in position and has an impact on the function and precision.

[0201] The invention is advantageous in that it creates a highly rigid closure 103 for a firearm 1, since the locking according to the invention between threads 116 and thread segments 144 results in a very large closure surface, which, due to the inclination of the thread crests 117 and 146, also leads to increased interlocking under load. Furthermore, it is advantageous that the arrangement of the thread crests 117, 146, together with the defined rotation of the closure head 125, results in a highly precise and accurate, suction-engaging locking. To further improve this, the thread crests 146 can have slight bevels on their ends in the areas where they face the corresponding thread crests 117, so that the thread crests 117, 146 can slide into each other even more easily.

[0202] The arrangement of a rotating head bolt with a bolt head 125, a bolt head shaft 126 and a bolt body 133 also enables great variability in the firearm 1, because the actuation of this bolt 103 can be carried out both via a bolt handle in the manner of a straight-pull repeating rifle but also with a gas release and a bolt repeating movement by recoil and / or gas pressure on the one hand and forward movement by means of a bolt closing spring on the one hand, so that manual, semi-automatic and automatic weapons can be realized with one concept.

[0203] The entire closure structure is described in more detail below.

[0204] As already explained, the assembly comprising the bolt head 125 and the bolt head shaft 126 is held in an axial bore of a bolt body 133, whereby the bolt body 133 can slide axially on the bolt head shaft 126 (or vice versa). Furthermore, the bolt body 133 carries the control pin 136, which, when sliding along the control surface 135 or a correspondingly shaped control groove 135, causes the bolt head shaft 126 and thus the bolt head 125 to rotate.

[0205] In an advantageous embodiment, the bolt head shaft 126, on the one hand, and the bolt body 133, on the other hand, are mounted on a bolt carrier 160. In this embodiment, the bolt head shaft 126 is mounted rotatably but axially fixedly on the bolt carrier 160, while the bolt body 133 is axially displaceably but rotationally fixedly fixedly on the bolt carrier 160.

[0206] The bolt carrier 160 has a bolt carrier plate 161 and two bolt carrier longitudinal support arms 162, 163 extending therefrom in the same direction, as well as extractor arms 164, 165 extending therefrom.

[0207] The bolt carrier plate 161 is a flat plate-like component which is designed to be upright relative to the longitudinal extent of the bolt head shaft 126 or in the firing direction and has a substantially rectangular cross-section.

[0208] The bolt carrier plate 161 thus has a front wall 166, a rear wall 167 and two narrow side edges 168, a lower edge 169 and an upper edge 170.

[0209] Approximately centrally between the narrow side edges 168, from the lower edge 169, there is a bearing opening 171 for a bolt head shaft 126. The bearing opening 171 has a circular segment-shaped region 173 extending from the rear wall 167 to approximately half the transverse center of the thickness of the bolt carrier plate 161. From the front wall 166, the opening 171 is formed on both sides with straight engagement wall sections 173, which open or merge at the top into an approximately circular arc 74.

[0210] The opening and in particular the round opening area 172 and the straight wall sections 173 or the distance between them is dimensioned such that an end area 174 of the closure head shaft 126 is mounted in the round opening area 172, while the straight wall sections 173 can engage as springs 173 for a circumferential groove 175 which is arranged adjacent to the area 174 in the closure head shaft 126.

[0211] This makes it possible to arrange the closure head shaft 126 in the bearing opening 171 in an axially fixed manner, but rotatable between the wall sections 173.

[0212] The upper edge 170 of the bolt carrier plate 161 has two steps 176, which extend obliquely upward and thus, at a distance from the narrow side walls 168, raise the bolt carrier plate 161 upward and there lead to a roof surface 177 running parallel to the upper edge 170. A control surface 178 is formed centrally from the roof surface 177, sloping backward toward the rear wall 167. The control surface 178 extends from the rear wall 167 to approximately the longitudinal center of the roof surface 177 and continues from there with a control projection 179, which has a rounded upper end. The control surface 178 and control projection 179 have the task of cocking the striking piece of a lock (not shown) when the bolt travels backward.

[0213] Adjacent to the bearing opening 171, on both sides of the bearing opening 171, elongated grooves 180 with a rectangular cross-section are formed in the bolt carrier plate 161, which extend parallel to the lower edge 169 and the upper edge 170, each extending a short distance toward the narrow side walls 168. Narrow, inclined wall sections 181 extend from the lower edge 169 toward the bearing opening 171 or toward a lower edge of the groove 180.

[0214] Ending at the bottom with the lower edge 169 of the bolt carrier plate 161, two bolt carrier longitudinal support arms 162 extend forward on both sides of the bearing opening 171 and symmetrically with respect to the transverse center, perpendicular to the plane of the front wall 166 of the bolt carrier plate 161. The bolt carrier longitudinal support arms 162 are essentially cuboid-shaped with a flat outer wall 184, an upper wall 186 running transversely thereto, a lower wall 187 initially parallel to this and flat, and an inwardly facing wall region 185.

[0215] The outer walls 184 are spaced apart from the narrow side walls 168, so that a step is formed between the narrow side walls 168 and the outer walls 184.

[0216] The upper wall 186 and the lower wall 187 are formed parallel to the upper edge 170 and roof surface 177, respectively, but are spaced apart from the upper edge 170.

[0217] The lower walls 187 are formed with an initially flat area so that they terminate at a lower edge 169 of the bolt carrier plate 161 and extend it forwards.

[0218] The inner walls 185 are designed to continue the inclined surfaces 181 adjacent to the grooves 180, with corresponding grooves 188 extending the grooves 80 in the inner walls 185. Upper wall sections of the inner walls 185 between the grooves 188 and the upper wall 186 are recessed relative to the straight wall sections 173.

[0219] In addition, the bolt carrier longitudinal support arms 162 have flat front surfaces 189 which are arranged parallel to the plane of the front wall 166 or rear wall 167 of the bolt carrier plate 161.

[0220] From the front or end surfaces 189 of the bolt carrier longitudinal support arms 162 up to approximately one third of the longitudinal extension of the bolt carrier longitudinal support arms 162 from the bolt carrier plate 161 to the end surfaces 189, the lower wall 187 is rounded with a rounded area 190 which extends in a rounded circular arc from to the inclined surfaces 181.

[0221] The extractor arms 164, 165 are arranged on the end faces 189 and also extend forward. The extractor arms 164, 165 are ring-segment-shaped in cross-section, with a flat upper wall 192, a ring-segment-shaped outer wall 193, and a ring-segment-shaped inner wall 194.

[0222] In addition, the extractor arms 164 each have a flat lower wall 196 and front end surfaces 195. The end walls 195 run parallel to the end walls 189, the upper wall 192 and the lower wall 196 each run parallel to each other and parallel to the walls 186 or the flat areas of the walls 187.

[0223] The width of the extractor arms 164, 165 between the ring-segment-like outer walls 193 and inner walls 194 is, for example, approximately half the width of the bolt carrier longitudinal support arms 162 in the region of their upper wall 186. The walls 193, 194 are thus set back from the walls 185, 184, with the lower wall 196 terminating with the inclined surfaces in the region of these with a likewise inclined surface.

[0224] The shape of the extractor arms 164, 165 is designed to match the shape of the grooves 114 between the cylinder segments 111 of the bolt locking area 110 of the barrel extension 104 or bolt receptacle 102, so that the extractor arms 164, 165 engage in the grooves as positively as possible and are thus shaped to match the cylinder segments 111 in such a way that the circular arc of the cylinder segments 110 is closed when the bolt of the barrel extension or bolt receptacle is closed.

[0225] Adjacent to the end faces 195, a T-groove 195 is introduced at approximately equal spacing between the walls 192, 196, whereby the end walls 195 form corresponding rear grips 198, behind which the groove widens accordingly in the shape of a T-crossbar. An extractor claw is mounted in each of the grooves 197, which forms a flat rear wall 200 for contact with the flat end face 195 or flat end wall 195 of the extractor arms 164, 165 and is formed forwardly from an upper side to a lower side with a curvature 201, wherein the curvature 201 is rounded and optionally circular in shape such that it corresponds to a curvature at the end of the grooves 114. The extractor claws 199 are thus designed to be radially displaceable outwards and inwards in the T-slots 197 with corresponding T-shaped formations 202 which extend away from the rear wall 200.

[0226] From the groove bottom 203, oval or flat-heart-shaped bores 204 extend longitudinally through the extractor arms 164, 165, which also extend with an enlarged rounded cross-section through the bolt carrier longitudinal support arms 162, 163 and also extend longitudinally through the bolt carrier plate 161.

[0227] On the path of the bore 204 through the bolt carrier longitudinal support arms 162, 163 and the extractor arms 164, 165, for example, a step (not shown) is provided as a counterbearing for an adjusting screw (not shown). By rotating the adjusting screw (not shown), which is screwed axially into the extractor claws 199 or acts on them via an eccentric, the extractor claws 199 can be moved outward or inward via the T-shaped portion 202 in the grooves 197, so that either one extractor claw 199 or both extractor claws 199 can engage the extractor groove of a cartridge in a conventional manner.

[0228] Preferably, only one extractor claw engages, which means that the ejection direction of the cartridge can be adjusted to one side or the other via a cartridge ejector (not shown) on the one hand and the extractor claw which is only present or engages on one side.

[0229] The extractor claw 199 has an outer wall 205, wherein the outer wall 205 is shaped correspondingly to the outer wall 193, so that the extractor claw is flush with the wall 193 in an outer position in which it cannot engage in a cartridge extractor groove, or protrudes beyond the outer wall 193 in the outer position in which it does not engage.

[0230] When the extractor claw is activated, its outer surface 205 is set back from the outer wall 193 of the extractor arm 164, 165 by the amount by which it projects inwards, or is flush with it in accordance with the second alternative described above.

[0231] The extractor claws 199 are also spatially positioned relative to the bolt head 125 in that the bolt head 125 is fixed via the bolt head shaft 126 and its end or groove on the bolt carrier plate 161, and also spatially relative to the breech face of the bolt head 125 in that an inwardly projecting engagement edge is arranged at the corresponding height of the cartridge extractor groove of a cartridge.

[0232] The closure body 133 is a component that is essentially T-shaped in cross section and has a transverse component region 210 and an essentially vertical component region 211. The size ratios are approximately such that the width of the transverse component region 210 is approximately three times the width of the vertical component region and the thickness of the transverse component region from bottom to top is approximately the length of the longitudinal or vertical component region 211.

[0233] The transverse component region 210 is plate-like with a rear end wall 212, two longitudinal side walls 213 and a front end wall 214. A lower wall 215 is formed between the front and rear end walls 212, 214 and the longitudinal side walls 213.

[0234] A ceiling wall 216 is formed between the upper edges of the longitudinal side walls 213.

[0235] Extending centrally downwards from the bottom wall 215, i.e., away from the lower walls 215, is the upright component region 211 with side walls 217, which run parallel to the side walls 213 of the transverse component region 210 and orthogonal to the lower wall 215. The side walls 217 are symmetrically spaced from the side walls 213. The component regions 210, 211 have common rear and front end walls 212, 214.

[0236] A bottom wall 218 of the component region 211 is formed between the end walls 214, wherein the bottom wall 218 has a longitudinally central opening 219 which is formed in the cylindrical bore 134, which is formed coaxially around the longitudinal axis of the closure body 133 and a closure head shaft 126.

[0237] The bottom wall 218 extends outward beyond the side wall 217 with a spring section 220, which is arranged in an elongated, cuboid shape on the side walls 217 and thus extends the side walls 217 with a step 221. The distance between the step 221 and the bottom wall 218 running parallel thereto corresponds to the height of the groove 180 in the bolt carrier plate 161 and the bolt carrier longitudinal support arms 162, 163, with the projection of the spring elements 220 beyond the side wall 217 corresponding to the depth of the grooves 180. The elements 220 are thus designed to be received in the groove 180.

[0238] The height of the side walls 217 between the elements 220 and the lower wall 215 of the component area 210 is greater than the distance of the grooves 180 to the upper side 186 of the bolt carrier longitudinal support arms 162, 163 in the area of ​​their inner walls 185, so that in the inserted state of the bolt body 133 a gap remains between the upper walls 186 of the bolt carrier longitudinal support arms 162, 163 on the one hand and the lower wall 215 of the transversely extending component area 210 of the bolt body 133.

[0239] Thus, the spring projections 220 on the one hand and the grooves 180 on the other hand form a tongue and groove system with which the closure body 133 can be arranged in the closure carrier 160 in a longitudinally displaceable manner.

[0240] The ceiling wall 216 of the component area 210 is reinforced with two diagonally upwardly extending steps 224 to form an upper ceiling surface 225.

[0241] The steps 224 are each spaced apart from the side walls 213 and are formed correspondingly in terms of their height and their course in steps 176, wherein the surface 225 corresponds with respect to its transverse extent to the upper edge 177 of the closure carrier plate 161, so that the correspondingly formed edges terminate with one another.

[0242] From one side, a transverse groove 226, for example a rectangular one, is milled into a step 224, which opens into a through-bore 227, which is introduced orthogonally to the upper ceiling surface 225, passing through it into the closure body 133 and reaches to the bottom wall 218 of the component area 211 and thus passes completely through the closure body 133, preferably vertically.

[0243] The bore 227 has a diameter which is adapted to the outer diameter of a control pin 136, wherein the bore 227 is designed such that in the region of the longitudinal bore 134 it only partially extends laterally in the wall 217 delimiting the bore 134, so that the control pin 136 extends laterally into the bore 134.

[0244] Adjacent to the longitudinal walls 213 are continuous spring receiving bores 229 from the end face 214 to the end face 212. These bores 229 are wider in the area of ​​the end wall 214 and narrower in the area of ​​the end wall 212. Thus, the bores 229 narrow with a step 232 as they extend from the end wall 214 to the end wall 212. In the narrower area of ​​the bore 229, a pressure pin 230 is preferably arranged, which is mounted in the narrower area of ​​the bore 229 with a shaft 233 and is located with a further area 234, in particular in the manner of a nail head in the wider area of ​​the bore 229. The pressure pin 230 is dimensioned such that, on the one hand, it has the diameter of the bore 229 in the narrower area of ​​the bore and, on the other hand, is longitudinally displaceable in this area, but limited by the step 232.When the wider area abuts the step, the pin preferably protrudes a desired amount beyond the end wall 212. In order to apply spring pressure to the pressure pin 230, a compression spring (not shown), in particular a spiral compression spring, is located in the wider area of ​​the bore 229, which preferably has a diameter corresponding to the inner diameter of the wider area of ​​the bore 229. This compression spring is held under pressure in the bore 229 by corresponding screws (not shown) that are screwed into a corresponding internal thread of the bore 229 in the area of ​​the mouth of the wider area of ​​the bore 229 in the area of ​​the end face 214.

[0245] If necessary, the thread can extend so deep into the bore 229 and the screw can be designed as a grub screw in such a way that the spring pressure can be adjusted by screwing in the grub screws (not shown) to different depths.

[0246] In a basic position, the screws, in particular grub screws (not shown), preferably end up flush with the end wall 214 and do not protrude beyond it.

[0247] In the front wall 166 of the bolt carrier plate 161, blind holes 231 are provided for the purpose of supporting the pressure pins 229 in alignment with the bore 229 ( Fig. 15 , 16 ), which engage the free ends of the pins 229.

[0248] Adjacent to the bore 227, a longitudinal slot 233 is provided in the upper ceiling surface 225, which extends axially into the closure body 133 at a distance from the end walls 212, 214. Adjacent to the end wall 212, the slot 233 extends through the component region 210 into the bore 134, the length of the penetrating part of the slot being, for example, a quarter to a third or more of the total length of the slot 234. The mouth 235 of the slot 234 in the bore 314 is located, for example, in the longitudinal center of the bore 134. A lateral groove 237 is arranged from an end 236 of the slot 234 closer to the end wall 214. A vertical bore 239 is arranged in the groove base 238 of the groove 237 for receiving a spring and / or a spring-loaded pin.In addition, parallel to the slot 234, there is a flat rectangular groove 240 extending from the end wall 212 of the end wall 214, wherein the rectangular groove 240 does not have the depth of the groove 237, towards a wall 213, facing away from the slot 234, but ending with it and sweeping over it.

[0249] A locking lever 241 is mounted in the slot 234 and the groove 237.

[0250] The locking lever 241 is a flat, elongated component which is received upright in the longitudinal slot 234 and is arranged so as to be tiltable about a rotation axis (not shown) in the slot 234 such that a pawl extension 242, which is formed at one end of the locking lever, extends downwards through the mouth into the region of the bore 134 or can be pivoted into and out of this region of the bore 134.

[0251] For this purpose, the locking lever 241 has at its opposite end an actuating lever 243 which can be mounted in the groove 237 and is loaded in particular by the spring mounted in the bore 239 or the spring pressure pin mounted in the bore 239 and is pivoted about its axis of rotation in such a way that under the spring pressure the pawl extension 242 is pivoted through the mouth 234 into the bore 134 under spring pressure.

[0252] The groove 240 serves to receive and guide an actuating element or a control surface with which the actuating lever 243 can be pressed into the groove 237 against the pressure of the spring mounted in the bore 239, so that when the actuating lever is pressed in, the pawl 242 is pivoted through the mouth 235 out of the area of ​​the bore 134, wherein it is sufficient for the functionality of the closure if an actuating element 246 is present.

[0253] On the lower wall 215 of the component area 210, longitudinally or axially extending receiving grooves 245 are provided, in particular symmetrically between the longitudinal extent of the bores 229 and the walls 217 of the component area 211, which, however, are not continuous with the walls 212, 214, but are spaced apart by their groove ends.

[0254] These grooves 245 each serve to receive and secure an actuating element 246. The actuating element 246 has a connecting plate 247, which has a width corresponding to the distance between the side wall 217 and the side wall 213. Furthermore, the connecting plate 247 has a length corresponding to the length between the end walls 212, 214, so that the plate completely covers the respective underside sections of the undersides between the side walls 213 and the end walls 212, 214 on the one hand, and the side wall 217 on the other. The connecting plates 247 each have a spring element on their upper sides for engaging in the grooves 245, so that the connecting plate 247 is secured to the closure body 133 in the longitudinal and transverse directions.

[0255] Extending transversely to the connecting plate 147 from an upper side 216 of the component region 210 or adjoining it is an outer plate 248, which has the same longitudinal extent as the connecting plate 247 and is formed integrally therewith. With a short region 249, the plate 248 completely covers the outer wall 213 and extends beyond the connecting plate 247 and beyond the lower walls 218 downwards to a lower edge 250, on which a connecting spring 242 or a connecting projection 252 is arranged, projecting beyond an inner wall 251 of the plate 248, with which the actuating element 246 and thus the closure body 133 can be connected to an actuating rail 253. The actuating rail 253 has a corresponding recess 254 or a corresponding slot 254 in the area of ​​the projection 252. The actuating rail 253 runs in the direction of the weapon towards the muzzle, ieforward and serves to connect a repeating lever (not shown) to its front end so that the bolt can be started and moved with a repeating lever from an area located very far forward on the weapon.

[0256] As already explained, one actuating element 246 and one actuating rail 253 can be arranged on each side of the bolt body, but it is sufficient if the corresponding element is present on the side on which the shooter would have to repeat.

[0257] Due to the symmetrical design of both the actuating element 246 and the actuating rail 253, a weapon can be adapted to the needs of the shooter by arranging these elements on the respective side of the bolt body 133.

[0258] If, for reasons of symmetry, two actuating elements 246 and two actuating rails 246, 253 are present, it is sufficient, for example, to move the repeating lever from one side to the other side.

[0259] If only one actuating element 246 is arranged on the closure body 133 and thus also only one actuating rail 253, only one connecting plate is present on the other side in order to close the slot between the underside 215 or lower wall 215 of the component area 210 on the one hand and the upper wall 186 of the closure carrier longitudinal support arms 162, 163 and to bring about a positive connection.

[0260] In the assembled state, the actuating element 246 with the actuating plate 248 rests against the respective outer wall 184 of the bolt carrier longitudinal support arms 162, 163 and extends beyond their lower wall 187.

[0261] The functioning of the closure 103 will be explained again below.

[0262] According to the second embodiment, the closure head shaft 126 ( Figure 31 ) first and second locking grooves 153, 154 are arranged.

[0263] The first and second locking grooves 153, 154 are axial slots in the surface of the bolt head shaft 126, which are designed to correspond with the pawl 242 of the locking lever 241. In the Figures 29 , 30 , 31 , 32 The control pin 136 and the locking pawl 241 are each shown only in their function, but not in their complete spatial arrangement in the locking body 133, in order to better explain the function.

[0264] The first and second locking grooves 153, 154 are axially offset from one another and also radially offset from one another, with the second groove 154 being further away from the closure head 125 than the first groove 153, but being arranged in front of the first groove 153 in the direction of closure rotation. The axial distance between the grooves 153, 154 corresponds to the screw-in depth of the closure threads into one another, while the radial distance corresponds to the arc length that the closure travels during the screw-in movement until the end of the screw-in movement. This means that with an opening or closing angle of 60° of the closure head 125 in the closure receptacle 102, the arc distance between the two grooves 153 and 154 is also 60°.

[0265] As already explained, the rotation of the closure head 125 is effected by a feed movement of the closure body 133 (in the Figures 29 to 32not shown). The bolt body 133 slides on the bolt head shaft 126, whereby the control pin 136, which is in its control pin bore 227 ( Figure 20 ) rests ( Figure 21 ), slides along the control surface 135 and causes the locking head 125 to rotate (in Figures 29 to 32 ) to the right. The starting position is in Figure 26 Here, the control pin 136 rests on the axial formation 140 of the control surface 135. During the forward movement, the rotation of the locking head 125 takes place according to the Figures 29 and 30 . The inclined surface 139 of the control surface 135 is shaped exactly so that the angular offset between the axial regions of the control surface 135, namely the regions 140 and 138, corresponds to the angular offset (in this case 60°) traversed by the closure head 125 when fully screwed in.

[0266] Both the open position ( Figures 30 , 32) as well as the closed position ( Figures 29 , 31 ) are preferably lockable.

[0267] In the open position, it is possible for the closure 103 to be fully inserted into the grooves 114 with its grooves 145 in the area of ​​the threads 116 of the closure receptacle 102 and to be fully inserted into the grooves 114 with its thread segments 144. In order to then cause the rotation of the threads 116 and thread segments 144 completely into each other, the corresponding rotation of the closure head 125 is necessary. This position is then the closed position according to the Figures 29 and 31 .

[0268] In the open position ( Figures 30 , 32), the locking lever 241 is able to lock this position with the pawl extension 243 when the latter engages the groove 154. This is caused by the fact that the actuating lever 243, which is formed at the opposite end of the locking lever 241, is under spring pressure and can thus allow the pawl extension 242 to plunge into the groove 154 under spring pressure. In this locked position, movement of the bolt body 133 onto the bolt head shaft 126 is not possible, since both radial and axial movement are blocked by the locking lever 241.

[0269] If the locking lever 241 is lifted out of the groove 154 by pressure from above on the actuating lever 243, the Figure 31 and 29shown locked and closed position of the closure 103 can be achieved, in which the spring-loaded actuating lever 243 again pivots the locking lever 243 so that the pawl extension 242 this time dips into the axially front groove 153.

[0270] However, as already explained, the screwing-in movement of the bolt head 125 is promoted or effected in particular by compression springs acting between the bolt carrier 160 and the bolt body 133.

[0271] The locking lever 241 can be actuated, in particular, via the lock of the firearm 1, and in particular also via the safety slide or lever, so that the closed position and / or the open position can be locked when the safety is actuated. Locking the open position is particularly useful if, as in the invention, a spring pressure acts between the carrier and the locking body 133, since otherwise this spring pressure might lead to a rotational movement into the closed position.

[0272] Preferably, the locking lever 243 is pivoted such that the moment the bolt head 125 enters the bolt receptacle 102, the bolt head 125 is released. Rotation of the bolt head 125 would thereby be possible, but is prevented until the position is reached in which the threaded sections can slide into one another.

[0273] The invention is advantageous in that the modular construction of the breechblock 103, comprising a breech block 125 with breech block shaft 126 on the one hand and breech block carrier 160 to which the breech block shaft 126 is axially fixed, as well as breech block body 133, which is axially displaceable to a limited extent on the breech block carrier 160 and on the breech block shaft 126, creates an extremely reliable system which has a very high level of operational reliability and ease of maintenance and, thanks to the clever arrangement of the mechanical elements, in particular also the locking lever which can be controlled from the outside, enables faultless function and faultless, simple operation.

[0274] The lock system of the firearm according to the invention is described below.

[0275] The lock system 350 forms the toggle lever arrangement by means of a hammer arm 351 and a guide lever arm 352. The hammer arm 351 is an elongated component connected to the hammer rod 304 at one end 353. At the end 353, the hammer arm 351 is pivotable about a pivot axis 354, which extends through two cheeks 55 arranged at one end of the hammer rod 304 and which delimit the end 353 between them. Thus, the hammer arm 351 is rotatable about the axis 354 or shaft 354.

[0276] At a diametrically opposite end 356 of the hammer arm 351, there is an angled striking surface 357. A guide rotary shaft 358 is arranged at a distance from the end 356 or the striking surface 357 toward the end 353, but significantly closer to the end 356, and extends through the hammer arm 351. The free end 356 of the hammer arm 351, which protrudes beyond the shaft 358 and has the striking surface, is thus the actual striking piece.

[0277] The hammer arm 351 is rotatably mounted on the guide lever arm 352 by means of the guide rotary shaft 358.

[0278] The guide lever arm 352 is a flat plate-like element with two side surfaces 360, 361, an upper side 362 and a lower side 363 as well as a front end region 364 and a rear end region 365. From the rear end region 365 to the front end region 364, a receiving slot 366 for receiving the striking lever arm 351 extends over a partial length of the guide lever arm 352 approximately centrally between the side surfaces 360, 361. In the area of ​​the rear end region 365, a transverse bore 367 is introduced, which extends from the surface 360 ​​to the surface 361 and serves to receive the guide rotary shaft 358.

[0279] The front end region 364 of the guide lever arm 352 is formed with a rounded thickening between the surfaces 360 and 361, so that the surfaces 362, 363 or the upper side 362 and the lower side 363 thicken in the region of the end 364 to a more cylindrical region 368.

[0280] Extending laterally beyond the thickened cylindrical portion 368 of the front end portion 364 and virtually concentrically to the cylindrical portion 368, a cylindrical shaft stub 369, 370 each defines a guide lever arm rotation axis 352. The guide lever arm 352 is rotatably mounted on a chassis of a firearm (not shown) by means of the shaft stub 369, 370.

[0281] Approximately at the level of and along the extension of the rotational axis 371, a locking step 372 is arranged in the cylindrical region 368, which extends along the rotational axis 371 a short distance into the region 368 and thereby also projects into the shaft stubs 369, 370. Furthermore, the locking step 372 forms a wall 373 orthogonal thereto, which extends upward from the locking step 372.

[0282] The locking step 372 preferably runs slightly sloping outwards relative to the upper side 362 of the guide lever arm 352 or the lower side 363.

[0283] With respect to the plane spanned between the axis of rotation 371 on the one hand and the axis of rotation of the receiving bore 367 or the axis of the shaft 358 on the other hand, angled downwards and outwards, or at an angle of 3 to 25°.

[0284] A threaded bore 374 is provided running obliquely downwards from the wall 373 to the surface 363 and approximately in the transverse center of the guide lever arm 352 between the ends 364 and 365, which serves to receive a grub screw with which the locking length and thus the trigger travel can be screwed onto a trigger rod to be described later.

[0285] The bore 374 is, for example, arranged closer to a surface 361, ie between the surface 361 and the slot 366 adjacent to the slot 366.

[0286] Between the surface 360 ​​and the slot 366, a recess is formed from the underside 363 of the front side 364, which extends, for example, over approximately half the extent of the guide lever arm 352 from the front side 364 to the rear side 365. The recess is designed such that the lower side 363, including the cylindrical region 368, is left free in this area. The recess 375 extends from the underside of the cylindrical region into the guide lever arm 352, with the recess 375 having a recess roof 376 toward the top side 362. The recess roof 376 has a front region 377 and a rear region 378 and a transition 379 between them. The front region 377 extends from the wall 373 in a semicircular arc into the cylindrical region 368 of the guide lever arm 352, wherein the front region 377 runs obliquely to an upper side of the cylindrical region 368.Approximately at the level of the shaft stubs 369, 370, the front recess roof region 377 reaches the transition region 379, in that the spatial orientation of the recess roof 376 changes, so that the transition region 379 extends to a recess end 380 of the rear recess roof region 378 in the direction of a bottom side 363, also with a semicircular cross section towards the recess end 380, so that the front recess roof region 377 and the rear recess roof region 378 are formed at an angle to one another and in particular are formed inclined at an angle of 25 to 50° to one another.

[0287] It is understood that the recess roof 376 is semicircular or circular segment-shaped for practical reasons and in particular for manufacturing reasons, but these areas can also be flat.

[0288] When assembled, the hammer arm 351 and the guide lever arm 352 form the toggle lever assembly. The guide lever arm 352 can be pivoted up and down about the shaft stubs 369, 370, while the hammer arm 351 can be pivoted up and down about the shaft 354, and both are connected to each other via the shaft 358.

[0289] The toggle lever arrangement formed by the hammer arm 351 and the guide lever arm 352 is subjected to spring pressure via the hammer rod 304 and a striking spring (not shown) arranged around it.

[0290] Here, the guide lever arm 352 is fixedly arranged on the chassis 3 of a firearm 1 by the shaft stubs 369, 370, while the hammer arm 351 and the hammer rod 304 are movable to a limited extent in the firing direction and against the firing direction by pivoting the toggle lever arrangement.

[0291] Analogous to the knee lever arrangement described first, the knee lever arrangement consisting of the striking lever arm 351 and the guide lever arm 352 is in a secured position when the shaft 358 is located above the shaft stubs 369, 370 ( Figures 5 , 6 , 7 ) and in an unsecured, ready-to-fire position when the shaft 58 or its axis of rotation is below the shaft stubs 369, 370 or their axis of rotation ( Figures 8 , 9 , 10 ) and in a repulsed position ( Figures 11 , 12 , 13 ), when the rotary shaft or guide rotary shaft 358 is located below or completely below the shaft stubs 369, 370, whereby the hammer rod 304 is located furthest forward in the firing direction and the striking surface 357 of the end 356 of the hammer arm 351 serving as the hammer is located against a firing pin 330 ( Figures 11 , 12 , 13 ).

[0292] A safety rod 385 is provided for pivoting the guide lever arm 352 and thereby bringing about the secured and unsecured positions. The safety rod 385 is, for example, elongated and square and / or rectangular in cross-section, with an upper side 386 and a lower side 387. Continuous guide slots 389 are provided in side walls 388 parallel to the upper side 386 and lower side 387, respectively, through which corresponding bolts, shafts, or the like (not shown) pass and which hold the safety rod 385 only axially movable, but otherwise fixed, to a firearm chassis 3.

[0293] The safety rod 385 has a front end 390 on the firearm side, wherein in the area of ​​the front end 390 on the underside 387 there is a recess 391 for the lever 342 (not shown) already described with the first embodiment.

[0294] In addition, the safety rod 385 has a rear end 392.

[0295] Between the front end 390 and the rear end 392, adjacent to the recess 391 towards the rear end 392 and approximately at the level of a slot 389, the underside is formed with a control surface 393, which widens the safety rod 385 in height between the underside 387 and the upper side 386 from the area of ​​the recess 391 with a type of ramp.

[0296] In the region of the end 392, the safety rod 385 is formed on its upper side 386 with a rounded portion 394, wherein the rounded portion 394 is formed, for example, semicircular and / or has at least two bevels 394 on both sides, wherein the free end 392 of the upper side is formed with a control bead 395 which protrudes in a rounded manner on the upper side.

[0297] The bead 395 is designed such that it can interact with the recess 375 and in particular with the recess roof 376 and in particular has a corresponding shape such that it can interact with the recess roof 376 in a form-fitting manner or with its entire surface as far as possible.

[0298] The width of the securing rod 385 is dimensioned such that it corresponds to the width of the recess 375 or is slightly smaller, wherein the bead 395 is curved such that it can interact in a sliding manner with the front recess roof region 377 and the rear recess roof region 378, wherein in the case of a flat design of the roof regions, the bead 395 is optionally only curved in the longitudinal direction, but is flat in the transverse direction.

[0299] The safety bar 385 functions as follows. The initial position is the unlocked, cocked position of the lock, in which, for example, after loading or firing and repeating, the lock is in a fireable state ( Figures 8 , 9 , 10 ).

[0300] In this position, the control bead 395 is located at the entrance of the recess 375 in the area of ​​the wall 373. The guide rotary shaft 358 is located below the axis of rotation 371 of the guide lever arm 352. If the lock is now to be secured, the safety rod 385 is moved into the recess 375 against the firing direction. As a result, the bead 395 initially slides along the front recess roof area 377 on the top side before entering the transition area 379 and then hitting the rear recess roof area 378. Since the safety rod 385 cannot deflect upwards or downwards, a further forward movement of the guide lever arm 352 pivots around the axis of rotation because the bead 395 slides along the inclined rear recess roof area 378 and thereby raises the guide lever arm 352.Through this movement, the toggle lever arrangement consisting of the hammer arm 351 and the guide lever arm 352 is displaced against the pressure of the hammer spring (not shown) toward the hammer rod 304 and brought into the dead center region, where the toggle lever arrangement has its greatest length. Upon further insertion of the bead 395 into the recess 375, the guide lever arm 352 and the hammer arm 351 pivot upward beyond the dead center (assisted by the hammer spring), so that the secured position (. Figures 5 , 6 , 7) is achieved, in which, in particular, the front recess roof area 377 is supported on an upper side 386 of the securing rod 385, so that further pivoting is not possible. In this position, the toggle lever arrangement comprising the striking lever arm 351 and the guide lever arm 352 is held by the pressure of the striking spring (not shown). Furthermore, in this position, the bead 395 rests from below in the area of ​​the end 380 of the recess on the rear recess roof area 378 and thereby also prevents pivoting. This state is thus secured in two ways.

[0301] To get out of this secure position ( Figures 5 - 7) to return to the ready-to-fire position, the safety rod 385 is moved in the firing direction, whereby a front side 396 of the bulge 395 first reaches the area 379 and then into the area of ​​the front recess roof area 377. The front recess roof area 377 is then deflected by the front side 396 of the bulge 395 against the force of the firing spring (not shown), and thus the toggle lever arrangement consisting of the firing lever arm 351 and the guide lever arm 352 is initially deflected to the dead center, in which the firing spring experiences the greatest compression and the toggle lever arrangement has its greatest elongation relative to the longitudinal axis of the weapon. After the front side 396 of the control bulge 395 has completely pivoted the front recess roof area 377, the shaft 358 is again below the rotation axis 371.In this state, the toggle lever arrangement consisting of the hammer arm 351 and the guide lever arm 352 is not held by the safety rod 385, but by a trigger rod 398.

[0302] The trigger bar 398 is arranged parallel to the safety bar 385, but approximately at the transverse center of the guide lever arm 352. The trigger bar 398 is also a square or rectangular bar in cross-section with a front end 399 and a rear end 400. Aligned with the transverse recesses 389 of the safety bar 385, the trigger bar 398 has recesses 401, through which the same bolts as the recesses 389 pass, to allow axial movement but prevent upward or downward movement.

[0303] In the area of ​​the front end 399, the trigger bar 398 has a recess 402 for a lever 306 with which the trigger bar 398 can be actuated from the underside of the weapon 1.

[0304] At its free end 400, the trigger rod 398 has a region with a flat lower surface (not shown), which, in the manner of the first embodiment of a trigger rod 398, is designed to cooperate with the locking step 372 of the guide lever arm 352 against rotation of the guide lever arm 352.

[0305] A front face 403 of the trigger bar 398, usually arranged orthogonally to the lower surface, can rest against the wall 373 in the region of the bore 374. A screw arranged in the bore 374 can adjust the position of the trigger bar 398, and in particular the degree of overlap between the detent step 372 and the lower surface in the region of the free end 400 of the trigger bar 398.

[0306] The trigger bar 398 and the safety bar 385 can each have an abutment 404 on the top side in the region of their front ends 399, each of which has a receiving bore 405, in particular for a compression spring (not shown), which pressurizes both the safety bar 385 toward a safe position and the trigger bar 398 in a locked position. These compression springs are optional but not mandatory for the trigger bar 398.

[0307] In an advantageous embodiment, the lock 350 also has a locking bar 410.

[0308] The locking rod 410 runs parallel to the trigger bar 398 and is designed in the same way and also functions like a trigger bar 398, also having an abutment 404 and a receiving bore 405 for a compression spring (not shown). Furthermore, the locking rod also has a bottom surface (not shown) and an end surface 403, with which the locking rod can be brought into engagement with the detent step 372 in the manner of the trigger bar 398. The locking rod 410 has a control projection 411 on its underside, with which the locking rod can be brought into the detent engagement and thus into the locked position and can be brought out of this position.

[0309] The locking bar's function is to prevent the bolt from being knocked back when the bolt is not in a forward position, but rather behind the bolt in the firing direction relative to the weapon's longitudinal axis. If the weapon were knocked back in this position and the bolt were subsequently moved forward, the bolt would strike the knocked-back hammer arm 351 from behind, potentially damaging the lock.

[0310] The advantage of this embodiment is that the construction of the toggle lever solely by means of the impact lever arm 351 and the guide lever arm 352 ensures a comparatively simple construction of the toggle lever arrangement.

[0311] Another advantage is that the hole in the guide lever arm enables the lock to be secured and unlocked very reliably, but also with minimal effort.

[0312] It is self-evident that the previously described geometric configuration of the striking lever arm 351 and the guide lever arm 352 can also be modified for the implementation of the invention and, in particular, can be greatly simplified.

Claims

1. Firearm, in particular for firing fixed ammunition, having at least one firearm chassis (3), one firearm system support (4) and one firearm system device (5), wherein at least the firearm chassis (3) and the firearm system support (4) have corresponding gridded engagement means via which they can be arranged in axially different positions relative to each other, characterized in that at least one component (2, 3, 4, 5, 7, 50) has a plurality of engagement contour elements (12, 13) arranged in a grid and extending transversely to the longitudinal extension, and at least one further component (2, 3, 4, 5, 7, 50) has a correspondingly gridded, correspondingly shaped contour (10).

2. Firearm according to claim 1, characterized in that the corresponding contours (10) can be secured to one another by means of engagement means (40, 41) and are connected by screw connections.

3. Firearm according to claim 1, characterized in that the lock for firing and the safety catch for securing the lock are arranged above the breech bolt track opposite the magazine well (8) in the firearm system support (4).

4. Firearm according to claim 1, characterized in that the firearm chassis (3) and / or the firearm system support (4) and / or the firearm system device (5) are designed to be screwed together in a longitudinally divided manner.

5. Firearm according to claim 1, characterized in that the magazine well (8) on the firearm chassis (3) is designed such that a magazine holder (9) for releasably holding a magazine (55) is provided on a rear transverse edge of the magazine well (8), and the magazine well (8) is delimited at the front by a base plate (50) which can be arranged in a grid on the firearm chassis (3) via corresponding contours (10), wherein, for changing the length of the magazine well (8) to adapt to different cartridge lengths, a shoulder rest device (2) is provided which is vertically displaceable and releasable and is axially fixed on the one hand to a receptacle (56) on the firearm chassis (3) and arranges the firearm system support (4) in an axially displaceable manner by means of corresponding contours (10).

6. Firearm according to claim 1, characterized in that the firearm chassis (3), the firearm system support (4) and the firearm system device (5) are arranged one after the other from bottom to top, wherein the shoulder rest device (2) closes off the firearm (1) to the rear and to the rear above, above a breech bolt track, wherein the firearm chassis (3), the firearm system support (4) and a pistol grip device (7), and the shoulder rest device (2) each have the engagement contour (10), wherein the grids correspond to one another.

7. Firearm according to claim 1, characterized in that the contour (10) has wave-shaped projections (12) or wave-shaped double projections (12), both upwards and downwards, which are also offset from one another by half a grid, wherein these projections (12) are wave-shaped or tooth-shaped.

8. Firearm according to claim 1, characterized in that on the firearm chassis (3), the engagement contour (10) is formed twice, once facing the upper side and once facing the underside as wave arrangements (11) which are transverse to the longitudinal extent and offset from one another, wherein the wave crests (12) and the wave troughs (13) are arranged alternately on both the underside and the upper side, wherein the wave troughs (13) and wave crests (12) on the upper side and the wave troughs (13) and the wave crests (12) on the underside are offset from one another, in particular by half a wavelength, such that transversely to the longitudinal axis, a wave crest (12) on the underside is aligned with a wave trough (13) on the upper side, wherein a web (14) is provided between the wave troughs (13) of the upper side and the underside, which are offset from one another.

9. Firearm according to claim 1, characterized in that the contour (10) is formed in one piece from the material of the respective component (2, 3, 4, 5, 7, 50) of the firearm (1), or is designed as a mounted rail and projects inwards or outwards by a desired amount, in particular 2 mm, wherein the distance between equal flanks of the wave crests (12) is in particular 10 mm.

10. Firearm according to claim 9, characterized in that from an outer side (15) of the contour (10), the wave crests (12) and wave troughs (13) are inclined towards a wall of the respective component (2, 3, 4, 5, 7, 50) in such a way that in particular a 75° angle is formed, so that the contour (10) widens away from the wall, in particular in the region of the wave peaks (17) and at the base of the wave troughs (13), inwards, i.e. away from the wall, so that the inclination of the contour (10) in the region of the wave peak (17) and the wave troughs (13) is the same, while in the region between the wave troughs (13) and the wave peaks (17) the contour (10) runs flat, so that it is ensured that a correspondingly shaped counter-contour (10) is fitted or can be fitted positively and, moreover, that in the case of a positive fit between a counter-contour and a double-row contour, the positive fit and rear grip additionally reliably prevent pulling apart in the transverse direction.

11. Firearm according to claim 1, characterized in that the widths of the respective components (2, 3, 4, 5, 7, 50) are adapted to one another in such a way that they can be plugged into one another such that the corresponding contours (10) can be brought into a positive fit.

12. Firearm according to claim 1, characterized in that in order to secure an arrangement of contours (10) brought into a positive fit with one another against deflection upwards and / or downwards, a plurality of through-bores (41) are provided on the respective components (2, 3, 4, 5, 7, 50) from bottom to top, i.e. transversely to the longitudinal extent of the firearm (1), the axial spacing of which amounts to the grid of the contour (10) or a multiple thereof, so that the respective parts (2, 3, 4, 5, 7, 50) having a contour (10) can be screwed together via screw bolts passing through the bores (41).

13. Firearm according to claim 1, characterized in that fitting bolts (40) are provided on the respective parts (2, 3, 4, 5, 7, 50), which are also arranged in the grid dimension of the contour (10), but preferably a multiple thereof, in order to ensure a defined fit before screwing, wherein the fitting bolts (40) are arranged on the components (2, 3, 4, 5, 7, 50) in the region of one or more bores (41), replacing them, and engage in a bore (41) of the respective corresponding component (2, 3, 4, 5, 7, 50).

14. Firearm according to claim 1, characterized in that the barrel receiver has a receiving sleeve (20) with a receiving area (22) for a hand-guard and attachment device (6), wherein at least the receiving area (22) has a polygonal, in particular octagonal cross-section, wherein this cross-section is smaller in size than the remaining cross-section of the receiving sleeve (20), so that the receiving sleeve (20) tapers with a step (23) towards the receiving area (22) and the hand-guard and attachment device (6) is designed as a correspondingly designed tube and is also polygonal, in particular octagonal, and is dimensioned in terms of its inner diameter such that it can be pushed axially over the receiving area (22) in a positively fitting manner until it abuts against the step (23), wherein the receiving area (22) or the hand-guard and attachment device (6) has a so-called M-LOK system or Key-MOD system, which is known per se, in which recesses are provided in each of the eight surfaces of the hand guard and attachment device (6) in axial succession in a predetermined grid and in which receiving areas (24) for receiving locking blocks (25) are present in the receiving area (22), which in particular have two screw holes and a groove (26) for receiving a locating projection of the fastening block (25), three fastening blocks (25) being arranged radially one after the other.