Gas acceptance

Abstract

Gas take-off (5) for a handgun (1), with a gas cylinder (50) which is fluidically connectable to a tube bore in the weapon barrel (2) via a gas channel (51), comprising an actuator (10) which is arranged to be movable between at least two switching positions and is designed to open the gas channel (51) in a first switching position in order to provide the fluidic connection and to close the gas channel (51) in a second switching position in order to interrupt the fluidic connection, characterized in that the actuator (10) comprises a first stop (20) and a second stop (22), and the gas take-off (5) comprises a first stop surface (21) in order to limit the rotation range of the actuator (10) in the first switching position in cooperation with the first stop (20), and a second stop surface (23),to limit the rotation range of the actuator (10) in the second switching position in cooperation with the second stop (22).

Description

Field of the invention

[0001] The present invention relates to a gas take-off device according to the preamble of claim 1 of a handgun. The invention further relates to an actuator for such a gas take-off device. The invention further relates to a weapon barrel with such a gas take-off device. The invention also relates to a handgun equipped with such a gas take-off device.

[0002] In these documents, position designations such as “top”, “bottom”, “front”, “rear”, etc. refer to a firearm in which the bore axis is horizontal and the shot is fired forward away from the shooter. State of the art

[0003] Gas intakes for handguns and gun barrels equipped with them, as well as handguns, such as assault rifles, machine guns and precision rifles, are known in various designs.

[0004] Gas intakes are typically mounted on the gun barrel, approximately in the front third of a barrel or weapon tube. A gas channel within the gas intake is fluidly connected to a bore in the gun barrel to divert propellant gases released during firing from the gun barrel to operate a gas-pressure reloading mechanism. The gun barrel is housed and secured inside a gun housing in a so-called barrel receiver. Furthermore, the gun housing houses a longitudinally movable bolt assembly for firing a shot, extracting a spent cartridge case, and reloading.

[0005] The functional sequence during firing and automatic reloading can be simplified as follows: To fire the shot, the bolt assembly, in particular its bolt head, feeds a cartridge from a cartridge feed device into a cartridge chamber in the barrel in a conventional manner. Upon actuation of a trigger mechanism, a firing pin strikes the cartridge base and ignites a propellant charge, firing a projectile from the cartridge case through the barrel. As the projectile passes through the bore in the weapon barrel, the propellant gases released during the firing process can be diverted into the gas intake.

[0006] The diverted propellant gases are used to set the bolt assembly in a backward movement in the usual way. The propellant gases drive the bolt assembly rearward towards the stock at high speed via the gas take-off and a coupled gas rod. An extractor is provided on the bolt head which grips a cartridge case by its edge at the case base and pulls it out of the chamber as the bolt assembly returns. An ejector then expels the cartridge case from the weapon housing through a cartridge ejection port in the usual way. As the bolt assembly advances, another cartridge is fed into the chamber and the cycle repeats itself. In its forward end position, the bolt closes the rear end of the weapon barrel so that no combustion gases can escape to the rear of the weapon barrel when the cartridge charge is ignited.

[0007] An exemplary gas takeoff for an HK 433 assault rifle is known from DE 10 2017 002 165 A1 by the applicant. The gas takeoff comprises a mounting section for attaching the gas takeoff to a weapon barrel, a gas cylinder that can be connected to a bore in the weapon barrel via a gas channel, and a gas piston arranged longitudinally displaceably in the gas cylinder for driving a gas pressure reloading mechanism. A closure element, which has a passage for the gas piston, can be releasably coupled to the end of the gas cylinder facing the weapon stock. Furthermore, a weapon barrel equipped with such a gas takeoff and a self-loading firearm provided with the same are disclosed.

[0008] From US 2015 / 0 241 149 A1, a system for controlling the gas flow to an assembly with moving parts in a self-loading firearm is known. In this system, the weapon function of the drive is adjusted via a threaded bolt on the bolt carrier component, as shown, for example, in Fig. 6 and the Fig. 7 of US 2015 / 0 241 149 A1. Due to the sealing effect of the threaded bolt, the gas flow in this system cannot be completely shut off. This can lead, among other things, to increased contamination in the bolt carrier. Furthermore, this system has limited operation. A repeating function is not provided for this system, as there is always bolt movement when firing.

[0009] US 2016 / 0 209 138 A1 discloses a firearm in which the gas pressure in the actuation system is adjustable. The gas flow can be regulated via a variable threaded adjusting screw, i.e., a linear displacement is achieved. Thus, the weapon function and the shutdown function can be controlled via the same actuator. The user thus has the option of changing the basic weapon function. Due to the multitude of setting options, this can lead to malfunctions. Furthermore, switching between functions is time-consuming.

[0010] DE 32 44 315 A1 discloses an automatic handgun with a rigidly locked breech for ammunition with extremely high projectile impulse. To influence the effect of the gas-operated loading device used there, a shut-off valve is arranged between the barrel and cylinder. This valve can completely block or release the connection between the barrel and cylinder and can be moved into intermediate positions, in which it restricts this connection to a greater or lesser extent.

[0011] US 2013 / 0 098 235 A1 discloses an adjustable gas block designed for connection to the gas operating system of a self-loading firearm. To achieve an adjustable gas flow, a valve screw with click adjustment is proposed. This screw has a series of grooves into which a spring-loaded detent engages. When the screw is turned in or out, either by a tool or by an integrated, finger-adjustable knob or handle, the clicks of the detent provide the user with both audible and tactile feedback.

[0012] Furthermore, handguns with gas vents are known from US 2017 / 0 115 081 A1 and US 9 857 129 B1.

[0013] DE 10 2006 056 130 A1 by the applicant discloses a gas intake for a barrel, comprising a gas cylinder that communicates with the barrel bore via a connecting channel. Additionally, an inlet piece is provided that adjusts the effective flow cross-section and thus the working pressure in the gas cylinder to a specific weapon configuration.

[0014] Finally, US 2 748 662 A discloses a further gas intake for discharging and regulating the gas pressure of the propellant gases generated when the shot is fired. Task and solution of the invention

[0015] The object of the present invention is to provide an alternative gas vent, a weapon barrel equipped with it, and a handgun with such a gas vent. In particular, the aim is to provide a gas vent that can be closed and opened quickly, reliably, and completely without, for example, having to change the basic function of the weapon. Furthermore, the aim is to provide a gas vent that offers high functional reliability even when contaminated and is also compact.

[0016] This problem is solved by the subject-matter of independent claim 1 and the subordinate claims 20, 21 and 22.

[0017] According to a first aspect, the invention is based on a gas intake for a handgun, which has a gas cylinder which can be fluidly connected to a pipe bore in the weapon barrel via a gas channel.

[0018] In contrast to the prior art, the gas take-off has an actuator which is arranged to be movable between at least two switching positions and is designed to open the gas channel in a first switching position in order to provide the fluidic connection and to close the gas channel in a second switching position in order to interrupt the fluidic connection.

[0019] The actuator comprises a first stop and a second stop, and the throttle take-off comprises a first stop surface for limiting the rotational range of the actuator in the first switching position in cooperation with the first stop, and a second stop surface for limiting the rotational range of the actuator in the second switching position in cooperation with the second stop.

[0020] Unlike the prior art, the actuator regulates the gas flow rate not in a variable or linear manner, but rather in a stepwise manner. This stepwise control or adjustment enables quick and precise adjustment of the actuator, allowing the gas outlet to be closed and opened quickly and reliably.

[0021] While in at least the first switching position, propellant gases can be diverted to cause the bolt assembly to move backward in a known manner, in at least the second switching position, no or at most only a small amount of propellant gases are diverted. In this switching position, the ammunition is not fed automatically, but rather by manually operating the weapon's loading lever.

[0022] In other words, the invention provides a "switchable" gas supply. This allows switching between automatic and single-shot operation. Automatic operation of a handgun can be understood as semi-automatic or fully automatic operation. Single-shot operation, or repeating function, on the other hand, refers to a function of the weapon in which ammunition is reloaded from a magazine into the cartridge chamber via a manually operated loading mechanism. The weapon thus essentially functions like a repeating weapon.

[0023] The repeating function has proven particularly advantageous when using rifle grenades and / or subsonic ammunition. Subsonic ammunition has a maximum projectile exit velocity of 330 meters per second. To achieve the highest possible projectile energy despite this limited projectile velocity, subsonic ammunition projectiles are generally heavier than those of standard loads. Since a heavy projectile, due to its greater inertia, offers greater resistance to the gas pressure of the propellant charge, slower-burning powders are usually used to keep the gas pressure in the weapon within the permissible range. However, it is still possible for malfunctions to occur during operation of the weapon with subsonic ammunition, which are essentially due to the weaker charge of this particular ammunition.

[0024] The provision of the gas venting system according to the invention can prevent weapon malfunctions, especially when using subsonic ammunition. A further advantage is the prevention, or at least the reduction, of noise emissions that would otherwise occur during a repeating process. This may be particularly desirable in tactical operations.

[0025] It is possible to provide more than two switching positions, for example, three or four or more switching positions, to provide a gas outlet that allows for a gradual reduction or increase in the diversion of the propellant gases. This allows for different gas pressures to be provided for different operating modes or different ammunition. This provides a gas outlet that can be closed and opened quickly and completely, and also allows one or more intermediate positions that enable a predetermined gas flow.

[0026] However, it is preferable if the actuator can assume exactly two switching positions, allowing the gas channel to be either fully opened or closed. An actuator that only opens or closes is also referred to as a binary-acting valve. This allows a gas outlet to be provided with a structurally simple shutoff device that can quickly, reliably, and fully close and open the gas outlet without, for example, having to change the basic function of the weapon.

[0027] Preferably, the actuator is designed as a nozzle body with at least one bore and at least one outer wall, and the nozzle body is arranged to be movable such that in the first switching position the bore fluidically connects the gas cylinder to the pipe bore and in the second switching position the outer wall of the nozzle body closes the gas channel.

[0028] Preferably, the bore is designed as a nozzle that has the same cross-sectional area along its entire length. Particularly preferably, the cross-sectional area of ​​the bore or nozzle is less than or equal to the cross-sectional area of ​​the gas channel.

[0029] The actuator is preferably arranged transversely to the firing direction in the gas take-off. In this arrangement, the actuator can be arranged in the gas take-off so that it can be rotated about its longitudinal axis for adjustment between the at least first and second switching positions, or can be arranged so that it can be moved longitudinally in the direction of its longitudinal axis. The actuator is preferably arranged so that it can be rotated about its longitudinal axis, i.e., can be rotated about its own axis.

[0030] In a structurally simple embodiment of the invention, at least one bore is provided in the gas intake, through which the actuator is at least partially guided for mounting in the gas intake. Preferably, the at least one bore is designed as a continuous bore, which preferably extends transversely to the firing direction through the gas intake.

[0031] It is expedient if the gas channel for the gas take-off and the at least one bore for supporting the actuator are arranged relative to each other such that their axes intersect at an angle. The angle is preferably 90°.

[0032] In a preferred embodiment, the gas channel of the gas take-off runs vertically from top to bottom through the bore of the gas take-off, which runs transversely to the firing direction, for supporting the actuator.

[0033] Preferably, at least one securing element, preferably two securing elements, are provided for axially securing the actuator in the gas take-off point. The at least one securing element can be in the form of an axially mountable securing ring that can be inserted into a corresponding groove arranged on the actuator, for example, into an annular groove. The securing element can also be designed as an axial section that extends radially. The radial extension can, for example, be disc-shaped or plate-shaped and preferably form an end section of the actuator. If the actuator is guided through the preferably continuous bore transversely to the firing direction, two securing elements are preferably provided that axially secure the actuator to the left and right of the gas take-off point.

[0034] An actuator arranged transversely to the firing direction and axially fixed can be easily transferred from at least the first and at least the second switching position by rotation about its own axis.

[0035] In a further preferred embodiment of the invention, the actuator comprises at least one sealing element for sealing the gas channel. The at least one sealing element can, for example, be arranged in at least one groove of the actuator. One or more sealing or piston rings, for example, can be used as the sealing element. The at least one sealing element seals the actuator, i.e., prevents propellant gases from escaping from the actuator. This reliably prevents, in particular, a malfunction of the weapon.

[0036] In order to provide a particularly tight actuator, at least one sealing element is preferably provided in front of and behind the bore or nozzle of the actuator, viewed in the axial direction of the actuator.

[0037] In a further embodiment of the invention, the actuator is provided so that it can be locked in at least the first and at least the second switching position by means of a first pressure piece mounted on a first spring element, such as a compression spring or a coil spring. The locking mechanism holds the actuator in at least the first or at least the second switching position and can only be adjusted against the spring force of the spring element. Known detents or locking devices can be used to implement the locking, with a mechanism falling into the at least the first or at least the second switching position as a specific position and remaining in this position.

[0038] Preferably, a first spring-loaded pressure piece is provided, which is arranged and designed such that, starting from the at least first or at least second switching position, a rotary movement of the actuator in the direction of the respective other switching position causes an axial movement of the first pressure piece against the force of the first spring element and, upon reaching the respective other switching position, an axial movement of the first pressure piece with the force of the first spring element is permitted.

[0039] For this purpose, the actuator preferably has a first contact surface that can be brought into contact with the first pressure piece or is in contact with it, and has at least two recesses. A recess can be understood as a through-hole or a hole with a specific depth that does not completely penetrate the component. A hole with a specific depth is also known as a blind hole. The at least two recesses are preferably arranged at a radial end of a securing element partially designed as a disc or plate.

[0040] The recesses are arranged at a specific angular distance. It is preferred if the at least two recesses are spaced from each other at an angular distance that between 30° and 90°, preferably between 45° and 80°, or preferably between 60° and 75°, or preferably 70°.

[0041] To facilitate engagement and disengagement, both the recesses and the end of the pressure piece that engages in the recesses are pointed or conical.

[0042] Alternatively, or in addition to the detent, the gas outlet preferably has a limiting means for restricting the rotational movement of the actuator. For example, the actuator can have one or more, preferably two, stops that, after a certain rotation, can come into contact with a corresponding stop surface of the gas outlet. This prevents, in particular, the actuator with the corresponding recess from being moved or rotated beyond the pressure piece.

[0043] In a preferred embodiment of the invention, a blind hole is provided in which the first pressure piece and also the first spring element are at least partially received. The end of the pressure piece that engages in the recesses of the contact surface of the actuator protrudes from the blind hole. The blind hole can, in particular, be arranged axially parallel to the bore of the actuator.

[0044] Since the movement of the actuator is a guided movement, it is not necessary to provide a guide rail or guide groove connecting the individual recesses. However, in a particularly preferred embodiment, it may be expedient to connect the recesses by means of a guide rail or guide groove to enable controlled guidance of the contact surface in contact with the pressure piece.

[0045] The actuator preferably has at least one operating element for tool-free adjustment and / or at least one tool insert for adjustment using a tool, particularly on the left and / or right side of the gas outlet. The tool insert can, in particular, have a screw drive profile, which is designed, for example, as a hexalobular or hexagon socket. Other profiles, such as slotted or cross profiles, can also be used.

[0046] In a further development of the invention, the gas take-off comprises a gas adjustment device at the mouth-side end of the gas take-off, which surrounds a mouth-side section of the gas take-off and can be brought into fluid connection with at least one gas outlet nozzle of the gas take-off for gas discharge.

[0047] The gas adjustment device can be operated and locked in particular in at least two gas control positions. For this purpose, it is preferred if a second pressure piece mounted on a second spring element and capable of being brought into contact with the gas adjustment device is provided in the gas take-off, and at least two locking grooves on the gas adjustment device are provided that can be brought into engagement with the second pressure piece, so that the gas adjustment device can be locked in at least a first gas control position and in at least a second gas control position by rotation about its own axis.

[0048] One of the at least two gas control positions is specifically designed for operation with a signature damper. In this position, the gas adjustment device is fluidly connected to the gas outlet nozzle of the gas take-off. The other of the at least two gas control positions is specifically designed for operation without a signature damper—so-called normal operation. In this position, there is no fluid connection between the gas adjustment device and the gas outlet nozzle.

[0049] Preferably, the at least two locking grooves in the circumferential direction of an end face of the gas adjustment device each form a fixed stop and a locking surface for the second pressure piece. The respective fixed stop, in cooperation with the second pressure piece, positively prevents rotation of the gas adjustment device in one direction of rotation, while the respective locking surface, in cooperation with the second pressure piece, allows the second pressure piece to be loaded to permit rotation of the gas adjustment device in the other direction of rotation.

[0050] Starting from one of the at least two gas control positions, the second pressure piece is engaged in one of the at least two locking grooves, i.e. it is in engagement with one of the two locking grooves. Due to the dimensions and / or geometry of the respective locking groove or pressure piece, starting from this position it is only possible to rotate the gas adjustment device in one of two directions of rotation in order to transfer the gas adjustment device to the other gas control position. Rotation in the other of the two directions of rotation is only permitted up to the point where the fixed stop comes into contact with the pressure piece. In this way, the interaction of the pressure piece with the fixed stop positively prevents any further rotation.

[0051] In contrast to the fixed stop, the locking surface, which is arranged essentially opposite in the circumferential direction, is designed to allow rotation of the gas adjustment device. For example, an inclined contact surface of the gas adjustment device allows rotation of the gas adjustment device against the force of the spring element acting toward the muzzle. This allows the gas adjustment device to be moved to the respective other gas control position through the interaction of the pressure piece and the contact surface.

[0052] In order to facilitate the transfer from one gas control position to the other, the locking surface is preferably inclined and the end of the pressure piece engaging in the locking groove is conical, spherical or tapered.

[0053] Preferably, the gas take-off has a guide slot at its muzzle-side end and the gas adjustment device has a complementary guide section for insertion into the guide slot in order to positively prevent an axial movement of the gas adjustment device in the direction of the muzzle in an inserted state.

[0054] The fastening device described above secures the gas adjustment device in a form-fitting manner both in the axial direction and in the circumferential direction and at the same time allows the gas adjustment device to be adjusted without tools.

[0055] Particularly preferably, the guide slot is formed by at least one guide groove formed on an axial projection of the outlet-side end of the gas take-off and arranged coaxially with the outlet-side section, and if the guide section is formed by a complementary radial projection on the gas adjustment device, which can be inserted into an insertion section of the guide groove. Insertion into the insertion section of the guide groove can occur in particular in the circumferential direction.

[0056] For the detachable coupling of the gas adjustment device to the gas take-off, the gas adjustment device can be pushed axially onto the muzzle-side section and rotated about the longitudinal axis in such a way that a contact surface of the gas adjustment device initially presses the second pressure piece against the force of the second spring element, and the rotation in one of the two directions of rotation releases one of the two locking grooves for locking the second pressure piece with the force of the second spring element.

[0057] To release the gas adjustment device, the second pressure piece can be acted upon against the force of the second spring element and the gas adjustment device can be rotated in one of two directions of rotation while the pressure piece is pressed.

[0058] It is preferred if the axial projection of the mouth-side end of the gas take-off is further designed as a barrier that prevents the pressure piece from being acted upon by a user's finger and allows the pressure piece to be acted upon by a suitable tool. This prevents the gas adjustment device from being accidentally released by a finger.

[0059] The above-described throttle adjustment device is part of the above-described throttle take-off with the actuator according to the invention. However, the throttle adjustment device can also be used with a throttle take-off without the actuator according to the invention or with an actuator other than the actuator according to the invention.

[0060] In particular, a gas sampling device for a handgun can be provided, which includes: a gas adjustment device at the mouth-side end of the gas take-off, which surrounds a mouth-side section of the gas take-off and can be brought into fluid connection with at least one gas outlet nozzle for gas discharge, wherein the gas adjustment device can be detachably coupled to the gas take-off via a fastening device, characterized in that in the gas intake a pressure piece mounted on a spring element and which can be brought into contact with the gas adjustment device and at least two locking grooves which can be brought into engagement with the pressure piece are provided on the gas adjustment device, so that the gas adjustment device can be locked in at least a first gas control position and in at least a second gas control position by rotation about its own axis.

[0061] Such a gas take-off device can have a mounting section for fastening the gas take-off device to a weapon barrel, a gas cylinder which is fluidly connectable to a pipe bore in the weapon barrel via a gas channel, and a gas piston arranged longitudinally displaceably in the gas cylinder for driving a gas pressure reloading mechanism.

[0062] This alternative gas removal can be further developed, in particular, with the features explained above concerning the gas adjustment device.

[0063] According to a further aspect of the invention, an actuator for a gas take-off device is provided for opening and closing a fluid connection between the gas cylinder of the gas take-off device and the bore in the weapon barrel of a handgun. The actuator can have a nozzle body with a bore arranged transversely to the longitudinal direction of the nozzle body.

[0064] The nozzle body can have at least one groove for receiving at least one sealing agent. It is preferred if the nozzle body has two grooves for receiving at least two sealing agents. Particularly preferred are two grooves for receiving the at least two sealing agents, with the bore being arranged axially between the two grooves.

[0065] The at least one sealing means can in particular be designed as one or more sealing or piston rings.

[0066] Furthermore, the actuator can be equipped with at least one securing element, in particular with two securing elements, in order to axially secure or fix the actuator on or in the gas outlet. The securing element can be provided, for example, as a securing ring, which is preferably received in a groove. Instead of a securing ring, the securing element can be embodied by a section of the actuator itself, such as a radially extending section, preferably with a disk- or plate-like shape. The at least one securing element can, in particular, form the closure of an axial end of the actuator. With a disk- or plate-shaped design, a groove can be omitted accordingly.

[0067] It is preferred to use a retaining ring at one axial end and a disc-shaped end portion at the other axial end of the actuator.

[0068] The actuator preferably has a tool insert. This allows the actuator to be adjusted using a suitable tool. Alternatively, or in combination with the tool insert, an operating element for manual adjustment of the actuator can be provided.

[0069] Preferably, the at least one securing element has at least two recesses for engaging a spring-loaded pressure piece. Particularly preferably, the at least two recesses are arranged at a radial end of the securing element, which is partially designed as a disc or plate.

[0070] The at least two recesses have an angular distance from each other which between 30° and 90°, preferably between 45° and 80°, or preferably between 60° and 75°, or preferably 70°.

[0071] To allow for easy engagement and disengagement, at least two recesses are conical.

[0072] According to a third aspect of the invention, a weapon barrel is provided with a gas take-off or an actuator as described above.

[0073] According to a fourth aspect, a handgun, in particular a machine gun or an assault rifle, is provided with a gas take-off device as described above or an actuator as described above or with a weapon barrel as described above.

[0074] The handgun preferably comprises a gas piston rod for detachable coupling to the gas intake and a locking arrangement coupled to the gas piston rod and arranged to be longitudinally movable in the weapon housing. Character list

[0075] Embodiments of the invention are explained in more detail below with reference to the attached schematic drawings: The drawings show: Fig. 1 a handgun according to the invention in a side view; Fig. 2 a gas intake for the weapon Fig. 1 in an assembled state in a side section; Fig. 3, Fig. 4 the gas consumption from Fig. 2 from the left and right side from one perspective; Fig. 5 the gas consumption from Fig. 2 to 4 in an open position of the actuator in further sections and a respective plan view, wherein the actuator is in an open position; Fig. 6 the gas consumption from Fig. 5 in a further section and a front view; Fig. 7 the gas consumption from Fig. 5 or 6 in a closed position of the actuator; Fig. 8 the gas take-off in the open position of the actuator from the left side from a perspective; Fig. 9 the gas consumption from Fig. 8 from the right side from a perspective; Fig. 10 the actuator from Fig. 2 in a side view; Fig. 11 the actuator from Fig. 10 in an exploded view; Fig. 12 the actuator from Fig. 11 with a spring element in a preferred embodiment; Fig. 13 the actuator and the spring element from Fig. 12 in another view; Fig. 14 the actuator from Fig. 11 and 12 in further views; Fig. 15 the gas adjustment device Fig. 2 from the front in a perspective; Fig. 16 the gas adjustment device Fig. 15 from behind in a perspective; Fig. 17 the gas intake with the gas adjustment device Fig. 15 and 16 respectively in a first and a second gas control position in a side view; and Fig. 18 assembly steps for installing the gas intake.

[0076] The structure and function of the gas vent for a handgun, or rather a gun barrel and a handgun with such a gas vent, are explained below with reference to the figures. The figures show preferred embodiments of the invention.

[0077] The construction of a handgun according to the invention is first described on the basis of the Fig. 1 explained. Fig. 1 shows the handgun 1 in a side view from its right side.

[0078] In the present case, the handgun is designed as an automatic weapon in the form of an assault rifle (HK417) and essentially comprises the following elements: a weapon barrel 2 with a gas intake 5 and a muzzle brake 3 mounted thereon; a weapon housing 4 into which the weapon barrel 2 is inserted; a handguard coupled to the weapon housing 4—but not shown—and a grip 7 mounted on the weapon housing 4. Furthermore, a loading device and a bolt assembly 8 are provided in the weapon housing 4. The weapon 1 further comprises a shoulder stock 9.

[0079] The individual assemblies or components, as well as their functions, are known per se, with the exception of the gas intake 5 according to the invention. For example, their functionality is comprehensively described in the applicant's DE 10 2017 002 242 A1, whereby it is irrelevant that the functionality is explained there using an HK 433 assault rifle.

[0080] Fig. Figure 2 shows a longitudinal section of a preferred embodiment of the gas take-off device. The gas take-off device 5 comprises a cylindrical tube bearing 35 for mounting on the weapon barrel 2. For this purpose, the flash suppressor 3 is removed or unscrewed, and the gas take-off device 5 is pushed on. To secure the gas take-off device 5, a bore 36 extending transversely through the bore serves as a bearing for a transverse pin that secures the gas take-off device 5. The gas take-off device 5 comprises a gas cylinder 50, which is fluidly connectable to a tube bore in the weapon barrel 2 via a gas channel 51. According to this embodiment, the gas channel 51 is formed by two gas channel sections 52a, 52b arranged in alignment with one another.

[0081] The gas takeoff also has a gas piston 40 arranged longitudinally displaceably in the gas cylinder 50 for driving a gas pressure reloading mechanism. The gas piston 40 is designed as a short-stroke gas piston. At its front, muzzle-side end, the short-stroke gas piston 40 comprises a gas piston nose or valve pin 41 for longitudinally movable guidance and sealing in a two-stage gas passage 54, which extends as an extension of the gas cylinder 50 to the muzzle. The gas passage 54 ends in a gas outlet nozzle 55 through which propellant gases can be discharged outward toward the muzzle. The valve pin 41 is conically beveled at its front end for easy insertion into the gas passage 54. The short-stroke gas piston 40 widens rearward toward the shaft into a conical section 42 and adjacently merges into a bearing section 43 with a circumferential annular groove.

[0082] The outer dimensions of the bearing section 43 are approximately complementary to the inner dimensions of the gas cylinder 50. Sealing rings are inserted into the groove to seal the short-stroke gas piston 40 against the gas cylinder 50. The bearing section 43 continues towards the shaft into a cylindrical section 44, the end of which protrudes through an opening 56 at the axial end of the gas cylinder 50. The outer dimensions of the cylindrical section 44 remain approximately complementary to the inner dimensions of the gas cylinder 50. The gas piston 40 also has a stop surface 45 for a counter-stop surface 57 formed on the shaft-side end of the gas cylinder 50 for limiting the forward movement of the gas piston 40 towards the muzzle.

[0083] The functioning of a short-stroke gas piston system is well known, so it need not be discussed further.

[0084] The gas intake 5 further comprises an actuator 10, which is arranged to be movable between two switching positions. A bore 53 (cf., for example, Fig. 3 and Fig. 4) is provided in the gas intake 5, through which the actuator 10 is guided transversely to the firing direction. As can be clearly seen, the actuator 10 separates the two gas channel sections 52a, 52b from each other. The actuator 10 is designed as a nozzle body with a bore 11 and an outer wall 12.

[0085] The actuator 10 can be rotated between exactly two switching positions: in a first switching position, to open the gas channel 51 and in a second switching position, to close the gas channel 51. In the first switching position, the bore 11 of the actuator 10 fluidically connects the two gas channel sections 52a, 52b to each other in order to fluidly connect the gas cylinder 50 to the pipe bore. In the second switching position, the outer wall 12 interrupts this fluidic connection and closes the gas channel 51.

[0086] The gas outlet further comprises a first pressure piece 30, which is mounted on a first spring element 31 within a blind hole 53a. The actuator 10 can be locked in its two switching positions via this spring-loaded pressure piece 30. Structural details of the actuator 10 and the first pressure piece 30 are shown in the following figures, particularly in the Fig. 10 to 14 are shown and explained.

[0087] The actuator 10 enables a switchable gas vent. In the first switching position, which can also be referred to as the open position, propellant gases can be diverted to cause the bolt assembly to move backward in a known manner. In the second switching position, which can also be referred to as the closed position, only single-shot operation is possible, meaning the ammunition must be fed via a manually operated mechanism. Such a mechanism is known and needs no further explanation.

[0088] The provision of the gas vent according to the invention can prevent weapon malfunctions, especially when using subsonic ammunition. A further advantage is the prevention, or at least the reduction, of noise emissions that would otherwise occur during reloading. Furthermore, the actuator can be switched quickly and precisely to open or close the gas vent accordingly.

[0089] The gas intake 5 further comprises a gas adjustment device 6. The gas adjustment device 6 comprises a sleeve-shaped body 60, which is slid over the muzzle-side end 5a of the gas intake 5 and then rotated about its axis to assume one of two gas control positions. The gas adjustment device has two gas outlet openings 66, 67, which can be aligned with gas outlet channels 58, 59 of the muzzle-side section 5a. Propellant gases can be released into the environment through these.

[0090] In principle, any plug-in rotary joints can be used to connect the gas adjustment device to the gas intake.

[0091] To lock the gas adjustment device 6 in one of the two gas control positions, a second pressure piece 80 is provided, which is mounted in the gas intake 5 on a second spring element 81 and can be brought into contact with the gas adjustment device 6 or with the sleeve 60. Complementary to this, at least two locking grooves 61, 62 are provided on the gas adjustment device 6 and can be brought into engagement with the second pressure piece 80 (see in particular Fig. 15 and Fig. 16). The gas adjustment device 6 is in the second gas control position, ie the second pressure piece 80 is locked in the locking groove 62 or engaged therein.

[0092] The second pressure piece 80 used for locking is mounted axially parallel to the firing direction in a second blind hole 82 on the second spring element 81 and is secured by means of a pin 83 arranged transversely to the firing direction. The pin 83 is in a bore 84 (see Fig. 3 and Fig. 4) is inserted, which is aligned transversely to the blind hole 82. The bore 84 extends partially through the blind hole 82, with the axis of the bore 84 extending above the blind hole 82. In an alternative embodiment, not shown, it is provided that the axis of the bore 84 extends below the blind hole 82.

[0093] The cross pin 83 secures the thrust piece 80 by limiting its axial travel forward. However, the rearward movement of the thrust piece 80, i.e., against the force of the spring element 81, is not hindered by the cross pin 83. This enables both simple assembly and controlled engagement and disengagement of the thrust piece from the respective locking groove 61, 62.

[0094] To install the second pressure piece 80, the spring element 81 and pressure piece 81 are first pressed into the blind hole 82 against the force of the spring element 81. In this pressed state, the cross pin 83 can be inserted into the bore 84. To release, the pressure piece 80 must first be pressed against the force of the spring element 81 before the cross pin 83 can be pushed out.

[0095] As particularly in the following Fig. 3 and Fig. As can be clearly seen in Figure 4, the second pressure piece 80 is obliquely flattened at its muzzle-side end on the upper side to form a contact surface 85 for the second pressure piece 80. In the inserted state, the transverse pin 83 is sufficiently loaded by the second pressure piece 80 to prevent it from accidentally slipping out of the bore 84. This provides a simple securing element that simultaneously allows the longitudinal movement of the pressure piece 80 to engage and disengage from the locking grooves 61, 62 of the gas adjustment device.

[0096] Design details of the gas adjustment device, in particular the plug-in rotary connection, are shown in the following figures, in particular in the Fig. 15 and Fig. 16 shown and explained.

[0097] Fig. 3 and Fig. 4 shows the gas take-off 5 described above in an exploded view from the left side and from the right side.

[0098] In Fig. 3, Fig. 4, it can be seen in particular that the actuator 10 has, at its left end, a contact surface 13 connected to the actuator 10 and in contact with the pressure piece 30, with two recesses 14, 15 corresponding to the pressure piece 30 for engaging the first pressure piece 30. The contact surface 13 is formed by the end face of a disc-shaped end portion 16 of the actuator 10 directed toward the gas outlet 5. The blind hole 53a is arranged axially parallel to the through-bore 53, so that the pressure piece 30 can also be arranged axially parallel to the actuator 10.

[0099] Fig. Figure 5 shows the gas sampling in three sections A, B and C and in a respective top view.

[0100] Section A runs longitudinally through the sleeve 60, the mouth-side section 5a and through the axis of the gas passage 54. Section A runs above the bore 84. Section A exposes the front end of the gas passage 54 and the gas outlet nozzle 55 and enables a top view, see lower image.

[0101] Section B runs longitudinally and partially along the axis of the blind hole 82 and along the axis of the actuator 30. Viewed from the front, section B initially reveals the second spring element 81, which is accommodated in the blind hole 82. It can be clearly seen that the blind hole 82 and thus the spring element 81 are aligned centrally in the gas take-off 5 and parallel to the firing direction.

[0102] Section B also reveals the "inner workings" of the actuator 10. It can be clearly seen how the bore 11 is oriented from "top to bottom" in order to fluidically connect the two gas channel sections 52a, 52b to one another, thus opening the gas channel 51. The actuator 10 is therefore in the first switching position. The first switching position is indicated by an "open circle" and the second switching position by a "cross in a circle" on the left side of the gas outlet. At the respective axial ends of the actuator 10, two tool inserts 17, 19 designed as hexagon sockets are provided, axially opposite one another (see in particular also Fig. 14).

[0103] Section C runs, viewed radially above section B and below section A in the longitudinal direction through the axis of the first pressure piece 30 and the first spring element 31. In the first switching position, the pressure piece 30 is engaged in the first recess 14.

[0104] Fig. 6 shows the gas take-off 5 of the Fig. 5 in a section D and a front view. Section D is a cross-section through the gas intake 5 and runs along the axis of the actuator 10 and through the bore 11.

[0105] The right-hand image clearly shows how the bore 11 of the actuator 10 fluidically connects the two gas channel sections 52a, 52b to enable the branching of the propellant gases. The second recess 15 is also clearly visible. Sealing rings 26 and 27 are located to the left and right, or in front of and behind the bore 11 (see Fig. Fig. 7) which seal the actuator 10.

[0106] In the left-hand image, it is clearly visible that the disc-shaped end section 16 further comprises two stops 20 and 22, each extending in opposite circumferential directions. The gas outlet 5 also has two corresponding stop surfaces 21 and 23. In the first switching position, the stop 20 comes into contact with the stop surface 21, as shown in the left-hand image. In the second switching position, the stop 22 comes into contact with the stop surface 23, as shown in Fig. 7 shown.

[0107] The stops 20, 22, in cooperation with the stop surfaces 21, 23, limit the pivoting or rotational range of the actuator 10 and prevent the respective recess 14 or 15 from being rotated beyond the tip of the pressure piece 30. In other words, the actuator 10 can only be rotated between the first and second switching positions.

[0108] Fig. 7 shows the gas take-off 5 of the Fig. 6 in the same section D, wherein the actuator 10 is in the second switching position. In this switching position, the outer wall 12 closes the gas channel 51. In the second switching position, the pressure piece 30 is engaged in the second recess 15. Furthermore, the embodiment of the Fig. 7 of those of Fig. 6, so reference is made to these explanations.

[0109] Fig. 8 and Fig. 9 show the gas take-off 5 described above from the left and right sides, respectively, each from a perspective, wherein the actuator 10 is in the first switching position, ie the first pressure piece 30 is engaged in the recess 14.

[0110] As already mentioned above, the gas intake 5 has a gas adjustment device 6 that can be adjusted between two gas control positions. The second pressure piece 80 is engaged in the second locking groove 62. Accordingly, the gas passages 58, 59 are closed by the inner side of the sleeve 60. This corresponds to the second gas control position.

[0111] The sleeve 60 is secured against unintentional loosening both in the axial direction and in the direction of rotation around its own axis.

[0112] For this purpose, the gas takeoff 5 has a guide slot at its mouth-side end, which in this case is formed by an axial projection 70, which is interrupted centrally by a recess 71, and a guide groove 72 arranged in the projection 70. The groove 72 runs essentially coaxially with the mouth-side section 5a, which is surrounded by the sleeve 60. The guide groove 72 forms a contact surface against which part of an end face of the guide section 65 of the sleeve 60 can rest in order to prevent the axial movement of the sleeve 60 towards the mouth.

[0113] The guide groove 72 has an insertion section 73 (right side) and 74 (left side) at its two circumferential ends. The guide section 65 of the gas adjustment device 6 can be inserted or screwed in through these respective sections 73, 74.

[0114] The locking grooves 61, 62 are each provided with a fixed stop 61a or 62a acting in the circumferential direction (cf. Fig. 15 and Fig. 16). In cooperation with the pressure piece 80, a rotation of the gas adjustment device 6 - starting from the second gas control position - in a direction of rotation 99 is positively prevented.

[0115] In the other circumferential direction, the locking grooves 61, 62 border on a locking surface 61b, 62b (cf. Fig. 15 and Fig. 16). If a user rotates the sleeve 60 in a rotational direction 98 to change the gas control position, starting from the second gas control position, the locking surface 62b is first brought into contact with the pressure piece 80, if it is not already in contact with the pressure piece 80. While maintaining the rotational force, the pressure piece 80 is subjected to an axially acting force and pressed into the blind hole 82 against the spring force of the second spring element 81. The transfer of the sleeve 60 into the first gas control position is now possible.

[0116] Further design details and explanations of the gas adjustment device 6 are particularly given in the following Fig. 15 to 18.

[0117] Fig. 10 shows the actuator 10 already described above for opening and closing the fluid connection between the gas cylinder 50 of the gas intake 5 and the tube bore in the weapon barrel 2 of a handgun 1 in a side view.

[0118] The actuator 10 is designed as a nozzle body extending in a longitudinal direction with a bore 11 and an outer wall 12. At one axial end thereof, an end section 16 is formed, which extends radially from the axis and has a disc-shaped form. The end section 16 has the contact surface 13, which is directed towards the gas outlet 5 (not shown). The nozzle body has two grooves 24, 25 for receiving two sealing means 26, 27 designed as sealing rings, wherein the sealing ring 26 is received in the groove 24 and the sealing ring 27 is received in the groove 25. The bore 11 is arranged axially between the grooves 24, 25. The actuator 10 further has a third groove 28 for receiving a securing element 18 designed as a retaining ring. The third groove 28 is arranged at the axially opposite end of the end section 16.

[0119] Fig. 11 shows the actuator 10 from Fig. 10 in a perspective view. From this perspective, the tool insert 17 and the recesses 14, 15 on the end section 16 are clearly visible. The two recesses 14, 15 are spaced at an angular distance of approximately 70° from each other.

[0120] Fig. 12 shows the actuator 10 from Fig. 11 and the pressure piece 30 in a perspective view. The pressure piece 30 is formed by a pin-shaped solid body, which is conical at an end 32 facing the contact surface 13. The pressure piece 30 and the spring element 31, designed as a spiral spring, are at least partially guided in a sleeve 33. The sleeve 33 corresponds to the dimensions of the blind hole 53a of the gas outlet 5.

[0121] Fig. 13 shows the actuator 10 and the pressure piece 30 of the Fig. 12 in an assembled state in a perspective view. The pressure piece 30 is engaged in the recess 14 and aligned axially parallel to the actuator 10.

[0122] Fig. 14 represents the Fig. 10 to 13, the actuator 10 is shown in two different perspectives. The right picture shows the actuator 10 in the Fig. 11 to 13, so reference is made to the above explanations. The left image shows the actuator 10 from the other side, looking at the contact surface 13 and the tool insert 19. As can be clearly seen, the recesses 14, 15 are conical.

[0123] Fig. 15 and Fig. 16 show the gas adjustment device 6 from two perspectives.

[0124] The gas adjustment device 6 is in the form of a sleeve 60 comprising two locking grooves 61, 62. The spring-loaded pressure piece 80 can engage in these locking grooves 61, 62. If the pressure piece 80 engages in the first locking groove 61, the gas adjustment device is locked in the first gas control position. If the pressure piece 80 engages in the second locking groove 62, the gas adjustment device is locked in the second gas control position.

[0125] The two locking grooves 61, 62 are arranged on an end face 63 of the gas adjustment device 6 at an angular distance of approximately 55° from each other and form a fixed stop 61a, 62a and a locking surface 61b, 62b in the circumferential direction. The end face 63 also serves as the contact surface against which the pressure piece 80 can be brought into contact in order to apply a force to the pressure piece 80 during assembly.

[0126] The first locking groove 61 forms the fixed stop 61a with one of its two lateral walls and the locking surface 61b opposite it with the other of the two lateral walls. The second locking groove 62 accordingly forms the fixed stop 62a with one of its two lateral walls and the locking surface 62b opposite it with the other of the two lateral walls.

[0127] Both fixed stops 61a, 62a border the end face or contact surface 63 in the circumferential direction. The locking surfaces 61b, 62b border an intermediate piece 64, which connects the locking grooves 61, 62 in a short distance. The intermediate piece 64 has the shape of a triangle when viewed in cross-section and is axially recessed relative to the end face 63, so that the height h of the intermediate piece 64—starting from the bottom of the groove 61, 62—is smaller than the height H of the end face or contact surface 63.

[0128] If the pressure piece 80 is engaged in the locking groove 61, it projects axially into it in such a way that the fixed stop 61a, in cooperation with the pressure piece, positively prevents (further) rotation of the sleeve 60 about its own axis in the direction 98.

[0129] Accordingly, the fixed stop 62a, in cooperation with the pressure piece 80, positively prevents (further) rotation of the sleeve 60 about its own axis in the direction 99 when the pressure piece is engaged in the locking groove 62.

[0130] The respective locking surface 61b, 62b is designed at an angle, so that the groove widens axially outward on this side. According to this embodiment, a step 64a or 64b is also provided, which initially extends at right angles from the groove in the axial direction and then merges into the inclined locking surface 62a or 62b. The inclined design of the locking surfaces 61b, 62b and the arrangement of the steps 64a, 64b make it easier, in particular, to apply a force to a conical end of the pressure piece 80 by rotating the sleeve 60.

[0131] The inclined locking surfaces 61b, 62b allow the sleeve 60 to rotate beyond these surfaces when the sleeve 60 is rotated in the corresponding direction and subjected to a force capable of overcoming the force of the second spring element 81. In other words, the respective locking surface 61b, 62b, in cooperation with the pressure piece 80, causes the pressure piece 80 to be subjected to pressure to permit rotation into the respective other gas control position.

[0132] The gas adjustment device 6 further comprises a guide section 65 complementary to the guide slot of the gas take-off for insertion into the guide slot. This section can be inserted into the guide slot to positively prevent axial movement of the gas adjustment device 6 toward the muzzle.

[0133] The guide section 65 is formed by a radial projection which is radially adjacent to the intermediate piece 64.

[0134] Fig. Figure 17 compares the gas takeoff 5 with the gas adjustment device 6 in the first gas control position (left image) and in a second gas control position (right image). In the first gas control position of the gas adjustment device 6, a fluidic connection is established between the two gas outlet openings 66, 67 and the two gas outlet channels 58, 59 - the gas adjustment device 6 is open. The open position is intended in particular for operation with a signature damper ("S"). In the second gas control position of the gas adjustment device 6, the two gas outlet channels 58, 59 are closed by the inner wall of the sleeve 60 - the gas adjustment device 6 is closed. The closed position is intended in particular for operation without a signature damper, the so-called normal operation ("N"). In both images, the actuator 10 is in the first switching position.

[0135] Fig.18 shows the assembly of the gas adjustment device 6 onto the gas intake 5 in three steps.

[0136] First, a user places the gas adjustment device 6 onto the mouth-side section 5a of the gas outlet 5 (t1) and pushes it onto it so that the radial projection 65 protrudes towards the right side of the gas outlet 5 and can be pushed axially past the guide slot 70, 72. Then, against the force of the second spring element 81, the second pressure piece 80 is pressed into the blind hole 82 (t2). The gas adjustment device 6 is now additionally rotated counterclockwise in direction 98 and inserts the guide section 65 into the insertion section 73 of the guide groove 72. The sleeve 60 must now be rotated in direction 98 until the pressure piece engages in the selected locking groove. In the sequence described above, the pressure piece 80 would first engage in the first locking groove 61 (t3) and then in the second locking groove 62.

[0137] It is also possible to insert the section 65 into the guide groove 72 via the insertion section 74 opposite in the circumferential direction, counter to the direction of rotation 98.

[0138] To disassemble the gas adjustment device 6, the second pressure piece 80 must first be pressed with a suitable tool. The sleeve 60 can then be rotated in or against the direction of rotation 98 until it emerges from the guide slot 70, 72 of the gas intake 5. The sleeve 60 can now be removed.

[0139] Further embodiments of the invention will become apparent to those skilled in the art within the scope of the following claims and the accompanying drawings.

Claims

[1] Gas intake (5) for a handgun (1), with a gas cylinder (50) which is fluidically connectable via a gas channel (51) to a tube bore in the weapon barrel (2), comprising an actuator (10) which is arranged to be movable between at least two switching positions and is designed to open the gas channel (51) in a first switching position in order to provide the fluidic connection and to close the gas channel (51) in a second switching position in order to interrupt the fluidic connection, characterized by in that the actuator (10) comprises a first stop (20) and a second stop (22), and the gas take-off (5) comprises a first stop surface (21) to limit the rotation range of the actuator (10) in the first switching position in cooperation with the first stop (20), and a second stop surface (23) to limit the rotation range of the actuator (10) in the second switching position in cooperation with the second stop (22). [2] Gas take-off (5) according to claim 1, characterized by that the actuator (10) is designed as a nozzle body with at least one bore (11) and at least one outer wall (12), and the nozzle body is arranged to be movable such that in the first switching position the bore (11) fluidically connects the gas cylinder (50) to the pipe bore and in the second switching position the outer wall (12) of the nozzle body closes the gas channel (51). [3] Gas take-off (5) according to claim 1 or 2, characterized by that the actuator (10) is arranged transversely to the firing direction in the gas take-off (5). [4] Gas take-off (5) according to one of claims 1 to 3, characterized by that the actuator (10) is arranged in the gas take-off (5) so as to be rotatable about its longitudinal axis or so as to be longitudinally movable in the direction of its longitudinal axis for adjustment between the at least first and second switching positions. [5] Gas take-off (5) according to one of the preceding claims, characterized by that at least one bore (53) is provided in the gas outlet (5), through which the actuator (10) is at least partially guided for storage in the gas outlet (5). [6] Gas take-off (5) according to one of the preceding claims, characterized by that at least one securing element (16), preferably two securing elements (16, 18) are provided for axially fixing the actuator (10) in the gas take-off (5). [7] Gas take-off (5) according to one of the preceding claims, characterized by that the actuator (10) comprises at least one sealing element (26, 27) for sealing the gas channel (51). [8] Gas take-off (5) according to one of the preceding claims, characterized by that the actuator (10) can be locked in at least the first and at least second switching position via a first pressure piece (30) mounted on a first spring element (31). [9] Gas take-off (5) according to claim 8, characterized bythat the actuator (10) has a first contact surface (13) which can be brought into contact with the pressure piece (30) or is in contact with it, with at least two recesses (14, 15) corresponding to the pressure piece (30) for locking the pressure piece (30). [10] Gas take-off (5) according to claim 9, characterized by that the at least two recesses (14, 15) have an angular distance from each other which between 30° and 90°, preferably between 45° and 80°, or preferably between 60° and 75°, or preferably 70°. [11] Gas take-off (5) according to one of the preceding claims, characterized by that the actuator (10) has at least one operating element for tool-free adjustment and / or at least one tool insert (17, 19) for adjustment by means of a tool on the left and / or right side of the gas outlet (5). [12] Gas take-off (5) according to one of the preceding claims, characterized bya gas adjustment device (6) at the mouth-side end of the gas take-off (5), which surrounds a mouth-side section (5a) of the gas take-off (5) and can be brought into fluid connection with at least one gas outlet nozzle (55) of the gas take-off (5) for gas discharge. [13] Gas take-off (5) according to claim 12, characterized by that in the gas take-off (5) there is provided a second pressure piece (80) which is mounted on a second spring element (81) and can be brought into contact with the gas adjusting device (6), and at least two locking grooves (61, 62) which can be brought into engagement with the second pressure piece (80) are provided on the gas adjusting device (6), so that the gas adjusting device (6) can be locked in at least a first gas control position and in at least a second gas control position by rotation about its own axis. [14] Gas take-off (5) according to claim 13, characterized byin that the at least two locking grooves (61, 62) in the circumferential direction of an end face (63) of the gas adjustment device (6) each form a fixed stop (61a, 62b) and a locking surface (61b, 62b) for the second pressure piece (80), wherein the respective fixed stop (61a, 62a) in cooperation with the second pressure piece (80) positively prevents rotation of the gas adjustment device (6) in one direction of rotation, and wherein the respective locking surface (61b, 62b) in cooperation with the second pressure piece (80) allows the second pressure piece (80) to be acted upon in order to allow rotation of the gas adjustment device (6) in the other direction of rotation. [15] Gas take-off (5) according to claim 13 or 14, characterized bythat the gas take-off (5) has a guide slot (70, 71, 72) at its mouth-side end, and the gas adjusting device (6) has a guide section (65) complementary thereto for insertion into the guide slot (70, 71, 72) in order to positively prevent an axial movement of the gas adjusting device (6) in the direction of the mouth in an inserted state. [16] Gas withdrawal according to claim 15, characterized by that the guide slot (70, 71, 72) is formed by at least one guide groove (72) formed on an axial projection (70) of the mouth-side end (5a) of the gas take-off (5) and arranged coaxially to the mouth-side section, and the guide section (65) is formed by a complementary radial projection (65) on the gas adjustment device (6) which can be inserted into an insertion section of the guide groove (72). [17] Gas take-off according to one of claims 13 to 16, characterized byin that, for coupling the gas adjustment device (6) to the gas take-off (5), the gas adjustment device (6) can be pushed axially onto the mouth-side section (5a) and can be rotated about its longitudinal axis in such a way that a contact surface (63) of the gas adjustment device (6) first presses the second pressure piece (80) against the force of the second spring element (81), and the rotation in one of the two directions of rotation releases one of the two locking grooves (61, 62) for locking the second pressure piece (80) with the force of the second spring element (81). [18] Gas take-off according to one of claims 13 to 17, characterized by in that, in order to release the gas adjustment device (6), the second pressure piece (80) can be acted upon against the force of the second spring element (81) and the gas adjustment device (6) can be rotated in one of two directions of rotation when the second pressure piece (80) is acted upon. [19] Gas withdrawal according to claim 16 or 18, characterized bythat the axial projection (70) at the mouth-side end of the gas outlet (5) is further designed as a barrier which prevents the second pressure piece (80) from being acted upon by a user's finger and allows the second pressure piece (80) to be acted upon by means of a suitable tool. [20] Actuator (10) for a gas take-off (5) according to one of claims 1 to 19 for opening and closing a fluid connection between the gas cylinder (50) of the gas take-off (5) and the tube bore in the weapon barrel (2) of a handgun (1), comprising a nozzle body with a bore (11) arranged transversely to the longitudinal direction of the nozzle body. [21] Weapon barrel (2) with a gas outlet (5) according to one of the preceding claims 1 to 19. [22] Handgun (1), in particular a machine gun or an assault rifle, characterized bythat it is equipped with a gas take-off device (5) according to one of claims 1 to 19 or with an actuator (10) according to claim 20 or with a weapon barrel (2) according to claim 21.

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