Firearms muffler and their cartridge reloading mechanism drive-muffler

Abstract

The inventions are aimed at better suppressing the sound of a shot from a supersonic firearm, as well as eliminating shock loads in the reloading mechanism. The muffler contains an expansion chamber (5) for gases (4) carried by the bullet (3) from the barrel (1) and channels (6, 7) for their release. At the end of the silencer is an obturator that blocks the flow of gases (4), which contains a flexible sleeve (15) and a piston (16) torsionally attached to it. The flexible sleeve (15) is made of rubber and is replaceable. The contact torso (19, 20) of the flexible sleeve (15) is made sectorally with radial slots and is equipped with metal plates (22). In the central hole of the piston (16), there are notches, circular or threaded grooves (21). The drive muffler of the firearm's cartridge reloading mechanism additionally includes a brake plunger (23) inserted into the gas (4) discharge channel, interacting with the reloading mechanism.

Description

[0001] FIREARMS MUFFLER AND THEIR

[0002] CARTRIDGE RELOADING MECHANISM DRIVE-MUFFLER

[0003] FIELD OF TECHNOLOGY

[0004] The claimed inventions, united by a common inventive idea, belong to various systems and purposes, including automatic firearm mufflers, and are aimed at maximally suppressing the sound of a shot. The second variant of the invention also has the function of a brake drive for the reloading mechanism of a self-loading or automatic weapon, to eliminate shock loads.

[0005] STATE OF THE ART

[0006] "Silent weapons" are mainly used for special operations, hunting or shooting practice, for hearing protection, and are practically not used on the battlefield.

[0007] With respect to the firearm muffler claimed in the 1st independent claim of the invention:

[0008] An inflatable cushion silencer for small arms is known according to Chinese application CN101769698A. It is primitive, even mimetic, and only indicates the effectiveness of temporarily delaying the gases accompanying the bullet to suppress sound, although its ability to work as such is doubtful.

[0009] - A gunshot silencer is known according to Georgian patent GEU20081465Y. Its disadvantages are low efficiency and limited scope of application.

[0010] An integrated silencer for a rifle barrel is known according to European patent EP3367042B1. Its disadvantages are low efficiency and limited scope of application. A tactical silencer is known according to Russian patent RU161.180U1. Its disadvantages are low efficiency and limited scope of application.

[0011] - A silencer is known according to Russian patent RU2374590C2. It attempts to delay the gases released by the bullet in the silencer space, while simultaneously attempting to work them there and temporarily dissipate their energy through a spring. However, it is impossible to contain and delay the gases ejected from the barrel, whic h, although expanded in the silencer, pass directly through the central hole, which are the main source of the sound of the shot. Therefore, this silencer is also less effective. The same applies to variants of the spiral-type muzzle brake according to Russian patent RU2397422C1.

[0012] - Variants of a firearm silencer are also known according to Russian patent RU2397421C1. We consider these silencers as a prototype in relation to the invention presented in the 1st independent claim of our invention, since they are the closest in their essential features. This is manifested in the fact that it also has an obturator - a shut-off valve for gases released by the bullet at the end of the silencer, at the final exit of the bullet from it. The bullet pierces this valve, pierces it and, as it were, turns it at such an angle that the internal space of the silencer remains closed, and the gases leave it through the porous metal body of the silencer. It is easy to predict that after a few shots, such a valve - obturator - will simply cease to exist or will no longer be effective, will no longer fulfill its purpose, not to mention how it will hinder the movement of the bullet itself and affect the shooting at the target.

[0013] With respect to the firearms cartridge reloading mechanism drive muffler claimed in the 5th independent claim of the invention:

[0014] A device for suppressing the sound of a shot is known according to Russian patent RU2414668C1, which, in the wake of the bullet leaving the barrel of a self-loading automatic weapon, provides for the action of a barrel-locking valve located in a transverse hole in the barrel itself. During this action, it provides for the escape of gases not in the direction of the barrel, but in an angular direction. We believe that such a sound suppression device will not have a sufficient effect in terms of suppressing the sound itself and, apparently, is more intended to mislead the enemy's hearing about the location of the shooter. In addition, such a design is simply unreliable, even from a security point of view - if the valve does not come out of the barrel at least once by means of a spring, it is easy to imagine what will happen during the next shot.

[0015] Silencers and / or suppressors for firearms or improvements thereto are also known, according to British patent GB757640. This device has a mechanical obturator / valve consisting of teeth, etc., which blocks the gases from the barrel directly along the trajectory of the bullet, also controlled by mechanical means, and vice versa, controlled by the reloading mechanism of the weapon. This device is unreliable both structurally and in terms of safety. It also does not have the function of driving the reloading mechanism, and its effectiveness in terms of suppressing the sound of the shot itself is difficult to speak of.

[0016] - Silencers and / or suppressors for firearms or improvements related thereto are also known, according to the British patent GB966934. We consider this device as a prototype in relation to the invention presented in the 5th independent claim of our invention, since it is the closest in its essential features. This is manifested in the fact that it also has an obturator ■■ a shut-off valve for gases following the bullet at the end of the silencer, at the final exit of the bullet from it, and has a means of interacting with the cartridge reloading mechanism, albeit for a different purpose than ours. This device has a mechanical obturator / valve consisting of teeth, etc., which directly follows the trajectory of the bullet from the barrel, also controlled by mechanical means, and vice versa, controlled from the reloading mechanism of the weapon. This device is both structurally and safety-wise unreliable. It also lacks the function of driving the reloading mechanism, and it is difficult to speak about its effectiveness in terms of suppressing the sound of the shot itself, or rather, we can only argue that it can only be low-effective - the valve presented does not provide any sealing and will simply break after several shots.

[0017] Information about a closer analogue / prototype (than the latter), which would also have the function of driving the weapon's reloading mechanism, is unavailable to the applicant. TASK OF THE INVENTION

[0018] The present inventions, united by a common inventive idea, are aimed at maximally suppressing the sound of a shot from a firearm, especially a weapon firing bullets at supersonic speeds, as well as at eliminating shock loads in the cartridge reloading mechanism, in order to increase the durability and accuracy of the weapon.

[0019] DISCLOSURE OF INVENTION

[0020] The claimed inventions are united by a common inventive idea, which is expressed in the solution of the same task (maximum suppression of the sound of a shot.) by the same object (silencer) and the achievement of a useful effect in the presence of common essential (including distinctive) technical features and thanks to them.

[0021] The objective is solved and the beneficial effect is achieved by the construction stated in the 1st independent item of claims, which is intended for many types of firearms, except when they function automatically, in that: firearms muffler, which includes a mount on the barrel, has a chamber for expanding gases from the barrel with a bullet and channels for their movement and discharge from the periphery, formed between the walls of two or more inserted bushings, in addition, a muzzle with a hole for the passage of the fired bullet is located at the end of the muffler and an obturator made in the form of a valve for shutting off the flow of gases during firing, it has the following essential distinguishing features in relation to devices known from the prior art: the obturator, or shut-off valve, contains a flexible tube with a central hole coaxial with the nozzle hole and a piston torsionally attached to it, while the torsos of the flexible tube and piston in contact are truncated, specifically, the outer part of the tube and the inner part of the piston are conical or / and spherical.

[0022] The set objective is solved and the beneficial effect is achieved by the construction stated in the 5st independent item of claims, which is intended for many types of firearms, including automatic weapons, in that: firearms cartridge reloading mechanism drive muffler, which includes a mount on the barrel, has a chamber for expanding gases from the barrel with a bullet and channels for their movement and discharge from the periphery, formed between the walls of two or more inserted bushings, in addition, a muzzle with a hole for the passage of the fired bullet is located at the end of the muffler and an obturator made in the form of a valve for shutting off the flow of gases during firing, and also includes a driving means interacting with the cartridge reloading mechanism, it has the following essential distinguishing features in relation to devices known from the prior art: the obturator, or shut-off valve, includes an elastic sleeve with a central hole coaxial with the muzzle hole and a piston with hole torsionally attached to it, in addition, the torsos in contact with the elastic sleeve and the piston are truncated, specifically, the outer part of the sleeve, and the inner part of the piston are conical and / or spherical, while the driving means interacting with the reloading mechanism is made in the form of a brake plunger of annular cross-section inserted into a cylindrical channel for the movement of gases formed between two concentrically arranged bushing walls, the travel of which is not less than the length of the cartridge, and an elastic, e.g. rubber, annular brake in contact with the cylindrical surface of one of the bushing walls is inserted into it, and gas inlet holes are made, which are directed into the annular space formed under the brake.

[0023] In relation to both variants set forth in the 1st and 5th independent claims of the invention, in order to obtain the best effect, the following specific distinguishing essential features are proposed and required by the dependent claims: the elastic sleeve is made of, for example, rubber and is placed in a muzzle with hole with the possibility of its replacement; in the elastic sleeve, from the side of the contact torso, two or more radial cuts are made, which divide the contact torso into sectors, and metal plates are attached to these sectoral sections or installed under them; surface of the piston hole has notches, circular or helical grooves.

[0024] EXAMPLES OF IMPLEMENTATION OF THE INVENTION (INDUSTRIAL APPLICABILITY)

[0025] Firearms muffler and their cartridge reloading mechanism drive muffler are illustrated by drawings showing:

[0026] Fig. 1 - The muffler of a firearm according to the 1st (independent) claim of the invention at the moment of firing, when the bullet has not yet left the muffler space and the rubber locking sleeve is also in a freely extended (initial) position;

[0027] Fig. 2 - The muffler according to the 1st claim of the invention, when the bullet has just left the muffler space and its exit hole in the rubber sleeve begins to close; Fig. 3 - The muffler according to the 1st claim of the invention, when the bullet has moved further away from the muffler and the hole in the rubber sleeve from which it exited has become stuck and closed;

[0028] Fig. 4 - The muffler according to the 1st claim of the invention, when the rubber sleeve has been extended back to its initial position and the internal space of the muffler is slowly emptied of gases;

[0029] Fig.5 - Firearms cartridge reloading mechanism drive muffler according to the 5th (independent) claim of the invention at the moment of firing, when the bullet has not yet left the muffler space and the reloading mechanism drive is also in the front end (initial) position;

[0030] Fig.6 - Firearms cartridge reloading mechanism drive muffler according to the 5th claim of the invention, when the bullet has left the muffler space, the hole in the rubber sleeve from which it came out is still engaged and closed, and the reloading mechanism drive is in the rear end position;

[0031] Fig.7 - Firearms cartridge reloading mechanism drive muffler according to the 5th claim of the invention, when the bullet has left the muffler space far away, the hole in the rubber sleeve is revealed - is in the process of returning to its original position, and the reloading mechanism drive is also in motion and returns to its front - initial position.

[0032] A firearm silencer according to the 1st independent and 2-4 dependent claims of the invention comprises a bracket (2) at the end of the barrel (1) of the weapon and has an expansion chamber (5) for gases (4) accompanying the bullet (3) from the barrel (1). Channels (7) for the movement (6) of their flows and for their discharge from the periphery are provided for the bullet-carrying gases (4), formed between the walls of two or more outer casings / bushings (8) inserted into each other, possibly between the walls of the middle (9) and inner (10) tubes / bushings, while at least one bushings (8, 9, 10) has a plurality of radial holes (11) or perforations for the exit of gases (4). At the end of the muffler, a muzzle (13) with a hole (12) for the exit of the fired bullet (3) is located, and an obturator, made in the form of a valve that shuts off the flow of gases (4) during firing, is located in it. The obturator, or shutoff valve, includes a flexible (e.g., rubber) sleeve (15) with a central hole (14) coaxial with the hole (12) of the muzzle (13) and a piston (16) torsionally mounted on it, as well as a central hole (17) for the exit of the bullet (3), which is coaxial with the longitudinal trajectory of the bullet (3), i.e. the longitudinal axis (18) of the muffler. The contact surfaces of the flexible sleeve (15) and the piston (16) are truncated, specifically, the outer surface (19) of the sleeve (15) and the inner surface (20) of the piston (16) are conical or / and truncated spheroidal. The surface of the central hole (17) of the piston (16) is provided with internal threads (21), circular grooves or notches. The contact surface (19) of the flexible sleeve (15), as an option, can be cut into two or more radial sectors and metal plates (22) can be attached to these sectoral sections or installed under them to increase wear resistance. The muzzle (13) is screwed onto the outer casing (8) of the muffler, with the possibility of unscrewing and replacing the rubber flexible sleeve (15).

[0033] The driving silencer of the reloading mechanism of a firearm according to the 5th independent claim of the invention includes all the features mentioned in the composition according to claims 1-4 of the invention and also has the following development: one of the muffler, namely the outer casing (8), is attached to the barrel (1) separately, at a distance back from the end of the barrel (1), by creating a concentric annular cylindrical space with it, in which, as in a pneumatic cylinder made for sliding the piston, a plunger (23) is inserted on the outer diameter of the barrel (1). The plunger (23) at the same time, with a partial length of its internal, stepped central hole, also sliding, is placed on one of the, namely, the inner tube (10), the diameter of which is greater than the outer diameter of the barrel (1), due to which an additional plunger-inter-barrel space (24) for the movement of gases (4) is created between the hole of the plunger (23) and the outer diameter of the barrel (1). Plunger (23) with one, or in order to eliminate bending loads, with two or three symmetrically arranged rods (25) or pushers arranged symmetrically on the circumference, is connected, i.e. they interact with the reloading mechanism of the firearm cartridges (not shown in the figures), which in turn usually has a return spring (not shown in the figures). The plunger (23) has a travel (M) between its forward and rearward limit positions, the value of which is greater than the length of the reloading cartridge (not shown in the figures). The front and rear positions of the plunger (23) and the arrangement of the radial holes / perforations (11) for the exit of gases (4) are structurally selected in such a way that in the rearmost position the radial perforation (11) is completely opened, the plunger (23) is out of contact with the bushing (10) and a circular channel (26) for the passage of gases appears between the inter-bushing channel (6) for the movement of gases and the barrel-inter-plunger space (24). The plunger (23) is equipped with a radially elastic annular brake pad (27) against the cylindrical sliding surface of the outer bushing (10), e.g. made of rubber, which is inserted into a groove made in the outer surface of the plunger (23), so that a space (28) is formed under the annular pad for the gases (4) to flow thereon. In the middle part of the outer surface of the plunger (23), along a length proportional to its stroke (M) and the arrangement lengths of the perforations (11), a cylindrical groove (29) is made, also for the passage of gases (4) during their evacuation. The additional movement space (24) for the plunger-inter-barrel gases (4) is connected by holes (30) on the one hand to the under-brake space (28) for braking the plunger (23) at the end of its backward movement, and on the other hand to the cylindrical groove (29) for discharging the gases (4) from this space (24) during the forward movement of the plunger (23), i.e. when returning to its initial position. The plunger (23) has sealing cuffs (31) with the outer cylindrical sliding surfaces of the barrel (1) and the inner cylindrical sliding surfaces of the casing (8).

[0034] The black arrows indicate the directions of movement of the gas flows (4) generated by the firing of the cartridge, and the white arrows indicate the directions of movement of the plunger (23), rods (25) and piston (16) at the corresponding moments shown in the figures.

[0035] The silencer of a firearm according to the 1st independent clause of the invention formula functions as follows:

[0036] The gases (4) produced by the shot, trailing the bullet (3), immediately spray out of the barrel (1) when it is ejected and fill the internal void of the inner casing (10) of the muffler - the expansion chamber (5). At this time, the gases emitted from the barrel naturally expand, depressurize it, reduce speed, convert part of the kinetic energy into heat and transfer it to the muffler structure, which is then, of course, transferred to the atmosphere, but slowly. The bullet (3) fired at supersonic speed overtakes the gases (4) and passes through the central holes (17, 14 and 12) of the piston (16), the flexible sleeve (15) and the muzzle (13). At this moment, the gases (4) in the expansion chamber (5) already press the piston (16), quickly move it along the longitudinal axis (18) of the muffler and press it against the flexible sleeve (15), which, as a result of the interaction between their contact conical torsos (19 and 20), causes deformation of the flexible sleeve (15), narrowing of its hole (14) and rapid closure. As a result, the gases (4) cannot immediately follow the bullet (3), which is the main factor in suppressing the sound of the shot. At this moment, i.e. before the flexible sleeve (15) is compressed, the path is opened and the gases (4) move in a zigzag manner through their movement channels (6) and radial holes / perforations (11), the inner (10), middle (9) and outer casing (8) tubes and pass into the atmosphere through the circular channel (7). At this moment, the pressure in the expansion chamber (5) gradually drops and the pressure force from the gases (4) on the piston (16) and the flexible sleeve (15) decreases, as a result of which the flexible sleeve (15) restores its initial position and pushes the piston (16) back. At this time, the muffler is finally emptied of residual gases (4), simultaneously from the hole (14) in the flexible sleeve (15). The notches, circular or helical grooves (21) made on the surface of the central hole (17) of the piston (16) additionally prevent the rapid emptying of the muffler from residual gases (4), causing their swirling and flow turbulence. The metal plates (22) attached to or built into the sector surface (19) of the flexible sleeve (15), which is a replaceable part, increase its wear resistance and service life.

[0037] The driving muffler of the firearm cartridge reloading mechanism according to the 5th independent claim of the invention, with the function of a muffler itself, works similarly to that described above (as the invention of the 1st independent claim), but at the same time it also performs the function of driving the firearm cartridge reloading mechanism, as follows:

[0038] At the moment when the bullet (3) has completely passed through the hole (14) of the muzzle (13), the piston (16) is moved forward, the flexible sleeve (15) is engaged, its central hole (14) is closed and the path to the gas movement channels (6) is opened, the gases simultaneously press the plunger (23) and quickly begin to move it and with it the rod / push (25), which interacts with the cartridge loading mechanism. As the piston (23) moves through a distance M, the radial gas (4) vent holes / perforations (11) in the casing casing (8) open sequentially, increasing in number. As the end of the stroke M approaches, a bulge forms in the plunger-barrel (24) and under-brake spaces (28), which tends to constrict the diameter of the brake shoe (27) and facilitate its free sliding in the inner cylinder of the casing tube (8), without contacting it. As the end of the stroke of M approaches, a circular channel (26) passing through the space (24) between the plunger and the barrel also opens, part of the flow of gases (4) flows there as well, and the pressure in the channel (6) drops again, which prevents the plunger (23) from advancing too quickly, i.e. a kind of braking of the stroke speed occurs. From this flow, gases (4) will penetrate through the holes 30 into the annular space (28) under the brake flexible brake (27), inflate the brake (27) and adhere to the inner sliding cylindrical surface of the casing tube (8), thereby braking the plunger (23) at the end of the stroke (M), while there will be no shock loading in the reloading mechanism, but rather a soft braking. At this moment, the spent cartridge case has already been removed from the muzzle of the barrel, and the new cartridge is already out of the clip and ready for reloading. At the same moment, as the gases (4) continue to escape through the perforation (11) and the pressure in the expansion chamber (5) and channels (6), the spaces (24 and 28) between the plunger and the barrel and under the brake (27) gradually decreases, on the one hand, the elastic sleeve (15) begins to restore its initial state, on the other hand, the brake (27) begins to release and the plunger (23) begins to move back to the distance M, i.e., to its initial position. During this movement of the plunger (23), which is ensured by the presence of a return spring in the reloading mechanism of the weapon cartridges and its impact on the rod / push (25), gases (4) flow from the plunger-barrel space (24) through the holes (30), the cylindrical groove (29) on the plunger (23) and the perforation (11). At this time, the muffler is finally emptied of residual gases (4), including from the hole (14) in the flexible sleeve (15), the plunger (23) finally returns to its original position, and at an accelerated rate and following the completion of this process, the muzzle of the barrel is reloaded with a new cartridge. When reloading the weapon cartridges, the design of the silencer itself, which includes a plunger (23) and a pusher (25), interacting with the spring of the reloading mechanism, ensures the optimal functioning of the reloading mechanism, since the movement of the plunger (23) is as follows:

[0039] Before the bullet (3) is fired, the plunger (23) is in its initial position, and as a result of the shot and the pressure of the gases (4) on it, it gains great acceleration until it reaches a certain maximum speed, and then continues to move essentially evenly (possibly even with a slight slowdown), which is due to the fact that the pressure of the entraining gases (4) slowly drops and the compression created in the space (24) between the plunger and the barrel also opposes further acceleration. The plunger (23) travels most of its travel M at this speed, pressing against the pusher (25) and through it activating the reloading mechanism. At this time, the spent bullet (3) casing is pulled out and put away;

[0040] At the moment when the plunger (23) approaches the end of its stroke, the circular channel (26) opens towards the plunger-barrel space (24), the gases (4) flow into it and instead of being compressed, on the contrary, a high pressure is immediately created. The gases also penetrate the annular space (28) under the brake and reach rubber pads (27), the plunger is quickly braked, to the limit where no impacts are made on the parts in either the muffler or the reloading mechanism. At this moment, the plunger (23) stroke is completed and a new cartridge is prepared for loading into the muzzle of the barrel;

[0041] Then, from this limit position of the plunger (23), its recoil begins with a slow acceleration from zero, to the extent that this acceleration is caused by the excess of the force of the spring of the reloading mechanism over the force of the residual gases (4) still present on the other side of the plunger, but now rapidly emptying. At this moment, such a slow acceleration in weapons is generally more desirable so that the new cartridge can be “carefully” inserted into the muzzle - into its socket, so as not to damage the surface of the bullet, which would subsequently affect the accuracy of the shot;

[0042] During the recoil M, the residual gases (4) trapped in the barrel-plunger space (24) leave the muffler through the holes (30), the cylindrical groove (29) and the perforation (11), while the residual gases in the channels (6) leave the muffler partly through the perforation (11), and partly through the central hole (14) of the flexible sleeve (15). At this time, the speed of the plunger (23) increases with great acceleration, accordingly, the spring of the reloading mechanism brings the new cartridge with great and increasing speed and reliably places it in the intended place in the barrel.

[0043] As can be clearly seen, through this muffler, due to the presence of the distinctive features given in the Claims of the invention, the process of reloading the cartridge proceeds smoothly, without transmitting blows to the weapon body, it is completed and the next shot becomes possible only after the muffler is emptied of the gases produced by the previous shot. The result is protection of the internal mechanism of the weapon from blows, increased accuracy of automatic shooting, as well as increased duration of operation of the muffler itself.

[0044] Both variants of the invention, as described above, provided for the maximum delay of the gases released from the barrel in the space of the muffler, their distribution of flows and their gradual and sequential emptying, although this entire process lasts approximately a tenth of a second - a hundredth of a millisecond. In this way, effective sound suppression is achieved by the muffler, to the extent that in general the gases directly released into the atmosphere by the bullet are the main source of sound intensity, the closure of which is carried out by means of an obturator - a valve that shuts off the direct flow of gases, and their gradual, slow release is carried out by the design proposed by the invention.

[0045] These are the cause-and-effect relationships between the distinctive features given by the Claims of the invention and the achieved result.

[0046] The existing methods and silencers / mufflers known to us, in their best performances, actually reduce the sound (sound) intensity of the shot (measured in decibels, dB) by only about 30%, or up to 70%, information presented in a different way is far from the truth. For example, the sound intensity of a shot from a Kalashnikov-type automatic weapon without a silencer is 140-142 decibels, and when using a silencer intended for it, it decreases to 100-110, which is still unbearable for the ear. In our case, we can boldly assert that using the claimed muffler, the sound intensity is halved and drops to an acceptable level.

Claims

Claims1. Firearms muffler, which includes a mount on the barrel, has a chamber for expanding gases from the barrel with a bullet and channels for their movement and discharge from the periphery, formed between the walls of two or more inserted bushings, in addition, a muzzle with a hole for the passage of the fired bullet is located at the end of the muffler and an obturator made in the form of a valve for shutting off the flow of gases during firing, characterized by, that the obturator, or shut-off valve, includes an elastic sleeve with a central hole coaxial with the muzzle hole and a piston with hole torsionally attached to it, in addition, the torsos in contact with the elastic sleeve and the piston are truncated, specifically, the outer part of the sleeve, and the inner part of the piston are conical and / or spherical;2. Muffler according to item 1, characterized by, that the elastic sleeve is made of, for example, rubber and is placed in a muzzle with hole with the possibility of its replacement;3. Muffler according to item 1, characterized by, that in the elastic sleeve, from the side of the contact torso, two or more radial cuts are made, which divide the contact torso into sectors, and metal plates are attached to these sectoral sections or installed under them;4. Muffler according to item 1, characterized by, that surface of the piston hole has notches, circular or helical grooves;5. Firearms cartridge reloading mechanism drive muffler, which includes a mount on the barrel, has a chamber for expanding gases from the barrel with a bullet and channels for their movement and discharge from the periphery, formed between the walls of two or more inserted bushings, in addition, a muzzle with a hole for the passage of the fired bullet is located at the end of the muffler and an obturator made in the form of a valve for shutting off the flow of gases during firing, and also includes a driving means interacting with the cartridge reloading mechanism, characterized by, that the obturator, or shut-off valve, includes an elastic sleeve with a central hole coaxial with the muzzle hole and a piston with hole torsionally attached to it, in addition, the torsosin contact with the elastic sleeve and the piston are truncated, specifically, the outer part of the sleeve, and the inner part of the piston are conical and / or spherical, while the driving means interacting with the reloading mechanism is made in the form of a brake plunger of annular cross-section inserted into a cylindrical channel for the movement of gases formed between two concentrically arranged bushing walls, the travel of which is not less than the length of the cartridge, and an elastic, e.g. rubber, annular brake in contact with the cylindrical surface of one of the bushing walls is inserted into it, and gas inlet holes are made, which are directed into the annular space formed under the brake;6. Muffler according to item 5, characterized by, that the elastic sleeve is made of, for example, rubber and is placed in a muzzle with hole with the possibility of its replacement;7. Muffler according to item 5, characterized by, that in the elastic sleeve, from the side of the contact torso, two or more radial cuts are made, which divide the contact torso into sectors, and metal plates are attached to these sectoral sections or installed under them;8. Muffler according to item 1, characterized by, that surface of the piston hole has notches, circular or helical grooves.

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