Weapon system

Abstract

The invention relates to a weapon system comprising a breechblock, formed at least by a breechblock carrier (5) and a breechblock head (3), wherein the breechblock carrier (5) is designed to support the breechblock head (3). In order to achieve a reduction or even an elimination of the forces acting on the breechblock drive during the unlocking of the breechblock and the removal of a cartridge casing, the breechblock head (4) is freely moveably relative to the breechblock carrier (3). In order to separate the breechblock and a breechblock drive of the weapon system during the recoil of the recoiling masses of the weapon system, a device (20) is designed in such a way that a mechanical separation can be produced between the breechblock and the breechblock drive with the recoil of the recoiling masses of the weapon system. With the forward motion of the recoiling masses, the mechanical connection between the breechblock drive and the breechblock is re-formed using the device (20). For the separating or connecting of the breechblock from / to a breechblock slider (6), which functionally cooperates with the breechblock carrier (5), the device (20) has at least one connection rod (23). The connection rod (23) is securely attached to the breechblock slider (6) by a rear end when viewed in the direction of fire. The front end can be connected to the breechblock carrier (5) and separated from same.

Description

[0001] DESCRIPTION

[0002] weapon system

[0003] The invention relates to a possibility, in particular for unlocking a breech of a weapon system, for example of an externally powered machine gun. The invention deals in particular with a forward unlocking of a breech during the forward movement of these retracting masses following a retraction.

[0004] Self-propelled or externally driven weapon systems are well-known, such as autocannons. In such weapon systems, a cartridge is fed to a breech and, with the aid of a breech mechanism, the cartridge is inserted into the barrel or into a chamber of the barrel. The breech movement includes periods of inactivity during which the breech must not move. Locking between the breech and the barrel is achieved using known locking mechanisms, such as block breech, wedge breech, or rotating lug breech.

[0005] A rotating bolt and a weapon with a rotating bolt are known from DE 10 2010 009 427 B4. The rotating bolt has a bolt carrier and a bolt head mounted therein with several locking lugs. The rotating bolt is designed such that the unlocking, in which the cartridge case is released from a cartridge chamber in the weapon barrel, is not controlled solely by the relative movement between the bolt head and the bolt carrier. For this purpose, a control cam section is formed in the locking piece, which interacts with a correspondingly designed control section in the bolt head. During unlocking, the rotational movement of the bolt head is converted into a screw movement relative to the locking piece. This screw movement unscrews the bolt head from the locking piece. The same control cams and control cam sections also perform the locking of the bolt.

[0006] Another rotary lock is disclosed in DE 10 2009 058 551 B4. A tongue-and-groove toothing of a cam holds a rotary lock cylinder in the unlocked position on the lock carrier. A guide shell of the lock carrier can thus be reduced to such an extent that it only secures the rotary lock cylinder against tilting out of its functional axis.

[0007] A locking system for an externally and / or internally powered weapon with a block breech is described in DE 10 2009 01 1 939 B4. During the recoil of the weapon's recoiling mass, the block breech is disengaged via control cams on the breechblock carrier and re-engaged during the recoil of the weapon.

[0008] As a rule, the locking of the breech or breech head with the gun barrel is achieved in such a way that the locking itself is effected by a chamber sleeve which in practice is connected to the gun barrel and possibly to a recoil damper, etc.

[0009] From EP 2 018 509 B1, a functional control system, particularly for the linear feeding of ammunition into a gun barrel, is known. The externally driven weapon or weapon system comprises a locking ring with lugs, which is preferably located on the gun barrel and overlaps it, as well as lugs on a breechblock. When the breechblock is in contact with the gun barrel, the projecting locking ring is rotated, thereby bringing the lugs of the locking ring behind the lugs of the breechblock and locking the breech. The rotation of the locking ring is effected by a bolt guided in a cam track. Unlocking is achieved by reversing the movement of the bolt in the cam track. The necessary standstill times for the weapon are realized here via the interacting cam track and the drive cam track.

[0010] A machine gun with firing control is known from DE 37 12 905 A1. The breech consists of a breechblock and a slide, each of which is separately arranged to be longitudinally displaceable within the receiver and can be positively coupled to each other via a connecting element. In the event of a cartridge malfunction, the disengaged breechblock remains in the locked position, while all other weapon functions and movements continue uninterrupted. A gas-pressure-controlled decoupling of the breechblock from the slide is provided. Such systems, especially those with external drives, particularly chain drives, have the problem that when the breechblock is unlocked and the empty cartridge case is extracted, significant forces act on the chain, which must be absorbed by the chain.

[0011] The invention therefore aims to solve this problem.

[0012] The problem is solved by the features of claim 1 or claim 13. Advantageous embodiments can be found in the dependent claims.

[0013] The invention is based on the idea of ​​minimizing the forces acting on the bolt drive when unlocking the bolt and extracting the cartridge case. In particular, the forces acting on the bolt drive when unlocking the bolt and extracting the cartridge case, especially when using an external drive such as a chain, are to be reduced or even eliminated.

[0014] According to the invention, these tasks of the breech drive are transferred to the breech and the gun barrel; the breech and gun barrel take over the unlocking of the breech and the extraction of a cartridge case, independently of the breech drive.

[0015] In implementing this idea, the recoil of the weapon after firing is used to unlock the bolt from the barrel and extract the cartridge case. That is, the recoil, and thus the recoiling mass of the weapon, is used to unlock and extract the cartridge case. As is well known, firing a weapon causes recoil, which accelerates the recoiling masses of the weapon, such as the barrel and bolt, in the opposite direction of fire. During recoil, some of the recoil energy is stored in recoil springs or similar components. This energy is used to propel the recoiling masses forward again when they are in the forward phase.

[0016] During the recoil phase of the weapon, a mechanical separation and reconnection of the bolt drive and the bolt are provided. According to the invention, for unlocking the bolt and extracting the cartridge case, the bolt is mechanically separated from the bolt drive during the recoil phase. At the end of the forward phase of the recoil phase, the mechanical separation created during the recoil phase is reversed, functionality is restored, and the bolt drive and the bolt are mechanically reconnected. This basic concept provides a new approach to circumventing shortcomings and problems, particularly those associated with an external drive. It also takes into account the fact that, in an externally driven weapon, the bolt is stationary at the time of firing, i.e., in the locked position, while the external drive continues to operate (see, e.g., DE 10 2015 121).

[0017] 771 A1, DE 10 2008 060 217 A1). Further developing this idea, the actual unlocking of the breech and the extraction of the cartridge case are then carried out during the forward movement of the recoiling mass following the recoil. Both the unlocking of the breech and the extraction of the cartridge case take place during the forward movement of the recoiling mass.

[0018] The breechblock according to the invention preferably comprises a breechblock carrier and a breechblock head supported thereby. The breechblock carrier can be held and transported by a breechblock slide. In this preferred configuration, the breechblock drive is mechanically connected to the breechblock carrier via the breechblock slide for weapon function.

[0019] During the return stroke of the returning masses, the mechanical separation between the locking slide and the locking carrier occurs. At this point, the locking carrier can move relative to the locking slide. After reversal and during the subsequent forward stroke, the mechanical connection between the locking carrier and the locking slide is re-established.

[0020] During recoil, the bolt head moves back along with the barrel as part of the recoiling mass. During this recoil, the bolt carrier and bolt drive separate. The bolt head is free to move relative to the bolt carrier during recoil.

[0021] As the recoiling masses advance, the bolt head is rotated in such a way that the connection between the bolt head and the barrel is released, unlocking the bolt. The bolt head is then caught by the bolt carrier. This unlocking allows the barrel, with the chambered cartridge case, to continue forward without the bolt head, so that the now stationary bolt head, with its extractor claw, can at least partially extract the cartridge case from the barrel.

[0022] These functions and processes are realized by a specially designed device. This device makes particular use of existing components of the breech system. The device interacts with a specially adapted breechblock carrier. The device has at least one movable slide on the breechblock carrier, pointing towards the gun barrel. In the simplest version, this slide can be inserted into the breechblock carrier. When the gun barrel, together with the bolt head, reaches this slide, it moves within the breechblock carrier. This movement releases at least one second slide. This second slide is rigidly connected to the breechblock slide and locks the breechblock carrier and the breechblock slide against each other. Releasing this second slide releases this locking mechanism and mechanical connection between the breechblock carrier and the breechblock slide.This separation interrupts the mechanical connection between the bolt carrier and the bolt drive, for example, an external drive. At the same time, the bolt carrier can now move freely, within limits.

[0023] During the forward movement of the receding masses, at least one of the slides is re-engaged, and the mechanical connection between the bolt carrier and the bolt slide is re-established. The bolt carrier is once again rigidly fixed within the bolt system.

[0024] In a further development of the invention, at least a third slide prevents the locking carrier from returning to its initial position (original position), i.e., all the way forward, when the locking carrier is reconnected to the locking slide. Further movement of the locking carrier is blocked. This at least third slide is overridden during the return stroke of the retracting mass and is therefore ineffective during the return stroke itself.

[0025] As the bolt head and barrel continue their forward movement, the bolt head rotates along or within a guide or groove in the bolt carrier. This rotation unlocks the bolt head from the receiver. The barrel continues to move forward without the bolt head being held in the receiver, thus moving away from the (unlocked) bolt head. As the barrel moves away from the bolt head, the cartridge case extraction begins. The bolt head pulls the cartridge case from the barrel. The cartridge case is detached and partially extracted when the barrel reaches its neutral position.

[0026] Afterwards, the bolt or bolt head, with its bolt carrier, which is firmly connected to the bolt drive via the bolt slide, can be moved to its rearward position as part of the actual weapon function. The extracted cartridge case is ejected in the usual manner, and a new cartridge is fed into the bolt. During the bolt's rearward movement, the bolt carrier returns to its starting position via the bolt drive in the actual weapon function, towards the firing position. At least one third slide is disengaged by a cam to release a locking mechanism. The bolt carrier itself can then be returned to its starting position by springs.

[0027] The advantage of this idea is that the bolt drive, especially the external drive, no longer needs to exert the force required to extract the cartridge case from the barrel. Consequently, a smaller drive mechanism, such as a smaller motor, can be used. The weapon can also be made more compact.

[0028] Should the recoil fail due to a misfire, the device will not interfere further with the actual function of the weapon.

[0029] In a further development of the invention, a firing pin in the bolt head is only cocked when the bolt is locked. Once the bolt is locked, a firing pin spring, which was cocked during the locking process, is released, and the firing pin is released. The release of the firing pin spring can be mechanical or electrical, e.g., magnetically. Because the firing pin spring is only released when the bolt or bolt head is locked, unintentional firing of the firing pin during bolt transport is prevented, thus disabling the weapon. A similar approach can be found, for example, in DE 10 2015 121 770 A1.

[0030] A weapon system with a breech is proposed, wherein the breech is mechanically connected to the breech drive of the weapon system for weapon function. A device is designed such that a mechanical separation occurs between the breech and the breech drive during recoil, i.e., the return movement of the recoiling masses of the weapon system. During the forward movement of the recoiling masses, a mechanical connection between the breech drive and the breech is re-established via the device.

[0031] The breechblock is formed by at least one breechblock carrier and a breechblock head, the breechblock carrier being designed to support the breechblock head. To minimize or even eliminate the forces acting on the breechblock drive during breechblock unlocking and cartridge case extraction, the breechblock head is freely movable relative to the breechblock carrier. A device is designed to separate the breechblock from the breechblock drive of the weapon system during the recoil of the weapon system's recoil masses, creating a mechanical separation between the breechblock and the breechblock drive during the recoil of the weapon system's recoil masses. Upon the forward movement of the recoil masses, the device re-establishes the mechanical connection between the breechblock drive and the breechblock.

[0032] For separating or connecting the bolt from a bolt slide that functionally interacts with the bolt carrier, the device has at least one connecting rod. The connecting rod is fixedly attached to the bolt slide at its rear end (viewed in the direction of firing). The front end can be connected to and separated from the bolt carrier.

[0033] The present idea can also be used in testing. In particular, it can be used to determine cartridge behavior, specifically the extraction forces. The present design can be assigned the function of a test device for this purpose. Each shot can be measured, meaning the data is available after every shot. For this purpose, measuring points, e.g., using strain gauges, can be provided, with at least one connecting rod. Such a test device is therefore also considered a weapon system.

[0034] The invention is not limited to an external drive as a locking drive.

[0035] The invention will be explained in more detail using an exemplary embodiment with a drawing. It shows;

[0036] Fig. 1 shows a side view of a gun barrel with a device according to the invention,

[0037] Fig. 2 is a top view of Fig. 1.

[0038] Fig. 3 shows the support or support system from Fig. 1 in a view from below.

[0039] Fig. 4 shows a device as shown in Fig. 1 in a side view,

[0040] Fig. 5 shows the device from Fig. 4 in a top view without the lid.

[0041] Fig. 6 shows the device from Fig. 4 in a sectional view.

[0042] Fig. 7 shows a sectional view of the closure carrier according to Fig. 1 ,

[0043] Fig. 8 shows a further section of the bolt carrier from Fig. 7, Fig. 9 shows a view of the bolt carrier from Fig. 5 with firing pin,

[0044] Fig. 10 shows another view from Fig. 9.

[0045] Figure 1 shows a tubular assembly of a weapon (not shown in detail). This tubular assembly 1 comprises at least one gun barrel 2 and a breechblock 3. The gun barrel 2 and breechblock 3 are guided over or attached to a support 4. The breechblock 3 is supported by a breechblock carrier 5. The breechblock 3 and the breechblock carrier 5 form a breechblock. In the preferred embodiment, the breechblock carrier 5 is functionally connected to a breechblock slide 6, and the slide is functionally connected to a drive mechanism (not shown in detail), in this case an external drive mechanism.

[0046] An external drive is provided by a motor that moves a chain or connecting rod (not shown) to move the bolt carrier 5, and thus the bolt, from a forward position (firing position) to a rear position (loading position). The necessary idling times of the bolt within the weapon are achieved via this external drive.

[0047] Device 20 is designated as a device. The function of device 20 is to mechanically separate the bolt carrier 5 and the bolt slide 6 when the bolt head 3 is still locked and is moved against the direction of fire by the recoiling gun barrel 2 as part of the recoiling mass of the weapon system or the weapon. When the recoiling mass moves forward, device 20 releases this mechanical separation.

[0048] Fig. 2 shows the pipe assembly 1 from Fig. 1 in a top view, Fig. 3 from below looking at the support system 4.

[0049] Figure 4 shows an enlarged view of the device 20. The device 20 is shown in conjunction with the bolt carrier 5 and the operation of the bolt head 3. A guide groove or guide cam 21 for a control bolt 22 of the bolt head 3 is incorporated, preferably laterally, into the bolt carrier 5.

[0050] The bolt carrier 5 is detachably connected to the bolt slide 6 via at least one connecting rod 23 (Fig. 6). The connecting rod 23 is fixed to the bolt slide 6 at its rear end (viewed in the direction of firing). The front end is connected to the bolt carrier 5 and can be detached from it. The connecting rod 23 ensures that the bolt carrier 5 remains firmly connected to the bolt slide 6 for transporting the bolt in its actual weapon function. In addition to the connecting rod 23, a compression spring 24, preferably a helical compression spring, is integrated or arranged between the connecting slide 6 and the bolt carrier 5.

[0051] The device 20 further comprises at least one first slide 25. This first slide 25 projects from the breechblock 5, pointing towards the gun barrel 2 (Fig. 4). As long as the first slide 25 is not actuated, i.e., not pressed, the breechblock 5 and the breechblock slide 6 form a mechanical unit via the connecting rod 23.

[0052] In addition to the first slide 25, the device 20 includes at least one second slide 26. This serves to mechanically separate the connecting rod 23 from the locking carrier 5 and is therefore controllable by the first slide 25 so that the connecting rod 23 can release its connection with the locking carrier 5 at the front end (Fig. 4).

[0053] Figure 4 further shows the guide cam 21 incorporated in the bolt carrier 5, which is designed to guide the control pin 22 of the bolt head 3 for unlocking the bolt head 3 from the gun barrel 2. The bolt carrier 5 also supports at least one spring sleeve 45 and a tension sleeve 46, which is slidably and rotatably mounted on it. This tension sleeve contains compression springs 41 and 42, preferably helical compression springs, and a tension pin 43 for a firing pin 40 located in a bore 44 in the bolt head 3. The compression spring 41 is used to cock the firing pin 40. The function of the compression spring 42 is to move the bolt head 3 into an open position and to hold it in its unlocked position.

[0054] Figure 6 shows these in a sectional view. Reference numeral 31 denotes a compression spring of the first slide 25, and reference numeral 32 denotes its stop piece for the first slide 25 in the locking carrier 5.

[0055] The functionality is as follows:

[0056] As shown in the figures, the breechblock or breech head 3 is locked and the weapon is fired. Ignition has occurred. The gun barrel 2 with chamber sleeve, the breech head 3, and the assemblies 40-46 integrated in / on the breech head 3, as recoiling masses of the weapon, move backwards in the opposite direction of fire. During this movement, the gun barrel 2 strikes the first slide 25 and moves it along its path 25' within the breechblock carrier 5. Due to the shape or contour of the first slide 25, this first slide 25 pushes aside at least one second slide 26. A recess 50 created by this second slide 26, shown in Fig. 8, is released, and the front end of the connecting rod 23 is free within a bore 11 in the breechblock carrier 5. The mechanical connection between the breechblock carrier 5 and the breech slide 6 is broken.The locking carrier 5 is carried along by the returning masses, while the connecting rod 23 can slide freely forward within the bore 1. In doing so, the connecting rod 23 passes over at least a third slide 29, pushing it away as the returning masses move back.

[0057] During the recoil phase, the recoiling masses, together with the bolt carrier 5, are moved back towards the firing direction, initiating the forward movement. It is understood that this recoil, and the associated path of the recoiling masses, is taken into account in the length of bore 1.

[0058] As the locking carrier 5 moves forward, the connecting rod 23 catches on a front edge 52 of at least one third slide 29. This restores the mechanical connection to the locking slide 6.

[0059] Due to the mechanical coupling of the bolt carrier 5 with the bolt slide 6, only the bolt head 3 with the locked barrel 2 now moves forward. During this movement, the control pin 22 on the bolt head 3 is guided along the guide cam 21, rotating the bolt head 3. This rotation unlocks the bolt head 3 from the barrel 2, which then detaches from the bolt head 3 and moves away from it. A cartridge case (not shown), held by an extraction claw 54 of the bolt head 3, is at least partially extracted from the barrel 2 during this forward movement. At the point when the barrel 2 reaches its neutral position, the cartridge case is completely removed from the barrel 2.

[0060] The bolt carrier 5 assumes its initial position during its return movement by the bolt slide 6, i.e., during the actual bolt transport when the weapon is functioning. In this process, at least one third slide 29 is disengaged by a cam 71 on the carrier 4, and the engagement by the front edge 52 of the slide 29 is released. The front end of the connecting rod 23 slides under at least one second slide 26 and moves back to its initial position. The front end of the connecting rod 23 comes to rest behind a rear edge 53 of the at least one second slide 26, which, driven by a compression spring 27, moves in front of the front end of the connecting rod 23. The front end of the connecting rod 23 is secured to the rear by an edge 55 in the bolt carrier 5 (Fig. 8). The compression spring 24 assists the bolt carrier 5 in assuming its initial position.The bolt slide 6 can move the bolt carrier 5 further into its rear position within the weapon. This ejects the spent cartridge case (not shown).

[0061] Preferably, two connecting rods 23 are used. These are aligned parallel to each other, with the locking head 3 arranged between them. This design increases the functional reliability of the device 20. When using two connecting rods 23, two compression springs 24 and two second slides 26 are also provided within the device 20 on the locking carrier 5. Both interact functionally with their respective connecting rods 23. The slides 26 are supported in their function by compression springs 27, preferably helical compression springs. This design preferably also necessitates two third slides 29 (Fig. 5) and two cams 71 on the carrier 4.

[0062] The firing pin 40 is cocked when the bolt head 3 is locked to the gun barrel 2. For this purpose, the bolt carrier 5 together with the bolt head 3 is moved forward again towards the gun barrel 2 by the bolt slide 6 and this by a bolt drive not shown in detail.

[0063] A fourth slide 47 is pushed upwards in its initial position by a spring 48 (Fig. 9). During the forward movement of the bolt 3 or the bolt carrier 5 in its actual firing function, the bolt head 3 with its control pin 22 slides along the guide cam 21 and locks with the gun barrel 2. During this rotational movement, the cocking bushing 46 with the firing pin 40 is guided rearwards along its cocking cam 49 against the fourth slide 47, opposite to the direction of firing, thus cocking the compression spring 41 and consequently the firing pin 40 (Fig. 10).

[0064] When the bolt head 3 has completed its rotation, the fourth slide 47 runs onto a cam 70 in the carrier 4. This causes the fourth slide 47 to move downwards, releasing the cocking bushing 46. The cocking bushing 46 and firing pin 40 are pushed forwards by the released compression spring 41. The firing pin 40 emerges from the bore 44 in the bolt head 3 and ignites a cartridge (not shown). A fifth slide 60 locks the fourth slide 47 in its lower position via a pin 61. The slide 60 remains in this position until the discharge process. When the bolt 6 retracts, the cam 70 actuates this fifth slide 60, allowing the fourth slide 47 to be pushed back into its initial position by the spring 48.

[0065] With the onset of the return of weapons, the cycle begins anew.

[0066] The weapon or weapon system can fire both targeted single shots and continuous fire.

[0067] Reference sign

[0068] Tube assembly 60 fifth slide gun tube 61 bolt

[0069] Locking head 70 cams (40) Carrier 71 cams (29, 60) Locking carrier

[0070] Locking slider

[0071] Lid

[0072] Hole in the locking mechanism

[0073] device

[0074] Leadership curve

[0075] Control bolt of the locking head

[0076] Connecting rod

[0077] Spring (compression spring)

[0078] first slider

[0079] Path of the first slider

[0080] second slider

[0081] Spring (compression spring)

[0082] third slider

[0083] Spring (compression spring) of the first slider

[0084] Stop piece for the first slider

[0085] firing pin

[0086] Spring (compression spring)

[0087] Spring (compression spring)

[0088] Tension pin

[0089] Drilling

[0090] spring sleeve

[0091] Clamping bushing

[0092] fourth slider

[0093] Feather

[0094] Tension curve

[0095] Allegation

[0096] front edge of the third slider

[0097] rear edge of the third slider

[0098] Extraction claw

[0099] edge in the locking mechanism

Claims

Patent claims 1. Weapon system with a breech, wherein the breech is mechanically connected to a breech drive of the weapon system, characterized by a device (20) which is designed such that a mechanical separation between the breech and the breech drive occurs during the recoil of the recoiling masses of the weapon system, and that during the forward movement of the recoiling masses the device (20) restores the mechanical connection between the breech drive and the breech.

2. Weapon system according to claim 1, characterized in that the breech is formed by at least one breech carrier (5) and one breech head (3), and wherein the breech carrier (5) is designed to support the breech head (3).

3. Weapon system according to claim 2, characterized in that the bolt head (4) is freely movable relative to the bolt carrier (3).

4. Weapon system according to one of claims 1 to 3, characterized in that at least one connecting rod (23) of the device (20) is designed to detachably connect the bolt carrier (5) to the bolt drive.

5. Weapon system according to claim 4, characterized in that a breech slide (6) is provided which can move the breech carrier (5) and can be detachably connected to the breech drive.

6. Weapon system according to claim 5, characterized in that the connecting rod (23) is fixedly attached to the breechblock (6) at a rear end as seen in the direction of firing and the front end can be connected to or separated from the breechblock carrier (5).

7. Weapon system according to one of claims 1 to 6, characterized in that the device (20) has at least one first slide (25) which projects from the breech carrier (5) in the direction of the weapon tube (2).

8. Weapon system according to one of claims 4 to 7, characterized in that the device (20) has at least one second slide (26) for mechanically separating the connecting rod (23) from the breech carrier (5).

9. Weapon system according to one of claims 1 to 8, characterized by a guide cam (21) provided in the bolt carrier (5) for guiding a control bolt (22) of the bolt head (3).

10. Weapon system according to one of claims 1 to 9, characterized in that a firing pin (40) is integrated in a bore (44) in the breech head (3).

11. Weapon system according to one of claims 4 to 10, characterized in that at least one bore (11 ) is provided in the breech carrier (5), wherein the front end of the connecting rod (23) can be guided within the bore (11 ).

12. Weapon system according to one of claims 4 to 10, characterized in that preferably two connecting rods (23) are used which are aligned parallel to each other, wherein the locking head (3) is arranged between the two.

13. Weapon system according to one of claims 4 to 12, characterized in that at least a third slide (29) is provided in the device (20) which releases the locking carrier (5) to assume its initial position during its return transport by the locking slide (6).

14. Method for unlocking a breechblock of a weapon barrel (2) of a weapon system according to any one of the preceding claims 1 to 13, characterized by the following steps: • Initiating a weapon rollback and return of the returning masses, • Unlocking of the lock during the forward movement of the returning masses.

15. Method according to claim 14, characterized in that a mechanical separation between the locking carrier (5) of the closure and a locking drive takes place during the return stroke of the returning masses and a mechanical connection between the locking carrier (5) and the locking drive is established during the forward stroke of the returning masses.

16. Method according to claim 14 or 15, characterized in that a part of the forward energy of the recoiling masses is used to release a cartridge case from the gun barrel (2).

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