RU2382311C1 - Automatic rifle semi-free breechblock - Google Patents

Abstract

FIELD: small arms.

SUBSTANCE: semi-free breechblock mechanism can be incorporated with long-barrel small arms. Breechblock mechanism lever has its base hinged to breech frame. Said lever moves its head mechanically, with radial acceleration along bullet flight to make an angle to frame and pusher to unlock parts immediately after the shot to unlock the breechblock. The latter motion occurs due to relatively small weight of the lever and, lever forming arm and displacement of center of gravity towards lever head part when slide system stops at extreme front position. Powder gas pressure reduced in barrel bore and breechblock self-braking force decreased in breech frame thrust opening, breechblock opens to get forced into initial extreme rear position.

EFFECT: breechblock operation independent of gun blow-back.

4 cl, 5 dwg

Description

The proposed mechanism of the half-free shutter can be used preferably in long-barrel small-arms automatic weapons as more advanced in comparison with systems that use the return of all weapons to work automatically.

The purpose of the invention is to eliminate the dependence of the operation of automation on the impact of the recoil of all weapons.

Before starting the presentation on the merits of the application, it seems that some literature review regarding the conditions for firing various systems, to some extent related to the proposed one, will not be out of place.

It is known that firearms are based on throwing a bullet from the barrel under the pressure of powder gases. Moreover, their pressure in the bore during the shot varies. It is of the greatest importance in the first period of burning of a powder charge of 2800-2900 kg / cm ² , which decreases as the bullet moves along the bore - at the muzzle end to 300-900 kg / cm ² , and when it leaves. All this takes place over a period of up to 0.06 seconds.

However, from the moment a bullet leaves the bore, the powder gases flowing out of it at a speed of 1200-2000 m / s continue to affect the bullet and tell it the additional speed that it acquires at a distance of several tens of centimeters from the muzzle end (Manual on a shooting case. Basics of shooting from small arms. M., 1984, pp. 7-10). Therefore, we can assume that when the powder gases expire from the barrel channel after the bullet, they, at this distance, with the same force, will act on the shutter in the direction opposite to the flight of the bullet. At the same time, the gas pressure in the long barrel lasts longer after the shot (Murakhovsky V.I., Fedoseyev S.L. in the book "Weapons of infantry", M .: Arsenal-Press, 1997, p. 115).

The automation of the weapon, along with other conditions, is determined by the method of locking the bore. The simplest solution is the recoil of the free bolt - not coupled to the barrel, which is used in melee weapon systems - mainly in pistols - machine guns. However, they require a shutter of a relatively large weight, and with a light shutter an excessively high rate of fire is noted, which entails an unproductive consumption of cartridges. Therefore, there was a need to slow it when moving away from the trunk. It is solved by inhibiting the exit of the cartridge case from the barrel chamber due to the grooves made in the chamber (Charlie Katshaw - Pistol - Klin machine gun, in the book. Small arms of Russia. New models “Exmo-Press”, 2002, p. 134); the use of the principle of roll-out on a shot of moving parts (Gallery - 9 mm. Submachine gun RM-63, f, Soldier of Fortune, No. 7 (130) July 2005, p.24), (Bolotin D.N. - Submachine gun Degtyareva, in the book Soviet Small Arms. M .., 1983, p. 110), (Svetlichny V.I., Mirzoev S.M., Mirzoev M.M., Ketoev K.K., Kugotov V.Kh. , Tsutsiev KS - automatic weapon shutter (Patent for invention No. 2199708, patent holder of the North-Caucasian Military Red Banner Institute, VV Ministry of Internal Affairs of Russia); complications of the shutter, consisting of several parts, the front part of the shutter directly supporting the sleeve, with its slight movement, causes a more vigorous movement of the other parts of the shutter; overcoming friction during the interaction of the protrusions of the bolt with the bevels in the grooves of the fixed body (AB Zhuk - Submachine gun - 39M, in the book. Rifles and assault rifles. M., 1987, p. 105, 109); self-braking action, when in the presence of high pressure the mechanism turns out to be self-braking, and when the pressure decreases, the bolt disengages from the barrel (A. Blagonravov - Thompson system submachine gun. Material of small arms, book 1., M.1945, p. 438 -440, Fig. 413, 414).

In weapon systems with locking the bore without self-opening, additional action is required to unlock it. In this case, it is advisable to unlock the barrel at the end of the shot when the pressure of the powder gases in it is reduced. For this purpose, in automatic weapons systems with the removal of powder gases, a gas outlet is made at a certain distance from the muzzle, which allows the shutter to be unlocked at the lowest pressure of the powder gases in the barrel.

The condition for unlocking the bore at a reduced pressure in it is inherent in other systems. So, in systems with recoil of the barrel, the bolt can be released from the barrel at the end of the move of the movable system - in the extreme rear position, or even during its movement in this direction.

Both of these systems are widespread, but they also have disadvantages. In systems with the removal of powder gases, the muzzle of the barrel when fired deviates to the side opposite to the location of the gas outlet, which reduces the results of firing, and systems with the movement of the barrel make the weapon heavier.

Unlocking the shutter can be made on the basis of the return of all weapons. Here, when the barrel is stationary relative to all weapons and has a bolt engaged with it, there is an inertial body; it is used to operate automation. So, in the Benelli Super 90 combat smoothbore weapon, the bolt consists of two main parts - a rotary combat larva and a massive bolt skeleton, playing the role of an inertial body. A spring is placed between them. When the weapon moves backward, when fired, the shutter frame, due to inertia, tends to stay in place and compresses the spring. Then, under the action of the spring, he moves back, turns the combat larva, unlocking the bore. The spring force is selected so that the unlocking begins after the bullet leaves the barrel.

When the entire shutter moves back, the spent sleeve is thrown out and the percussion mechanism cocked. Then the bolt moves forward under the action of the return spring, sends the cartridge into the chamber and locks the bore (Murakhovsky V.I., Fedoseev S.L., in the book “Weapons of infantry”, “Arsenal Press”, 1997, p. 250, 251 )

Similar automation was noted in the weapons of the Shegren design, where the inertial body, moving forward with respect to the weapon, compresses the working spring, accumulating energy in it. By unclenching the spring, the inertial body is thrown back, unlocks the shutter and captures it with itself. The system returns to its original position with a shutter spring (A. Blagonravov - Material part of small arms, book 1., M., 1945, p. 49).

Obviously, the automation of this type of weapon is dependent on the reaction of the support, as well as on the selection of springs that interact when the bolt is unlocked and moved to its extreme rear position, which does not guarantee reliable operation.

In firearms systems with manual reloading, most of them use handles. In some - they are made at the same time with the bolt or with its frame (7, 62 mm. Kalashnikov assault rifle (A.K.) - Manual on a small business. M., 1960, p. 33, fig. 33), (Blagonravov A. A. - Machine gun DP.The material part of small arms, book 2, M., 1946, p. 27, Fig. 15), and in others - the handle can be removable, coupled to the frame through the hole in its rack ( 7, 62 mm Degtyarev light machine gun (RPD) of the first issue. Manual on the shooting business. Second and supplemented edition. M., 1961, p. 33, Fig. 22).

Marked handles during movement of the moving system move with it, and in some systems, having performed the function of manual reloading, they remain in the front extreme position under the action of a special spring and do not participate in the working - automatic mode (Dmitriev A., Koshkarev S., - “Kovrovsky gunsmiths” - Pistol - AEK-19 machine gun K “Kashtan”, J. Soldier of fortune, No. 4 (31), 1997, p. 29.30), (Mukhovsky V.I., Fedoseev S.L. - Pistol -Star machine gun, model Z84, in the book The Infantry Weapon - Arsenal Press, 1997, p.134). The role of the handle is not limited to reloading weapons. It can perform other functions. For example, in the shutter we previously proposed, when placing the handle blade in one of its transverse cutouts located at some distance from each other, the rate of fire changes (Mirzoev S.M., Mirzoev M.M., Kalinin A.A., Ketoev K .K., “Remember the shutter”, the newspaper “Military Herald of the South of Russia”, No. 35 (23689), August 23-29, 2004, p. 5), and when placing the handle on the right or left side of the shutter, control amenities are created weapons for various categories of persons. So, when placing the handle on the right side of the weapon it will be more convenient for the left-hander, and on the left - for the right-hander (Mirzoev S.M., Mirzoev M.M., Ketoev K.K., Gazdanov A.V., Gazdanov A.U. ., Bekuzarova SA Patent for invention No. 2302601 - “The cover of the receiver.” Patent holder - Mountain State Agrarian University (GGAU)).

Based on our previous work related to the shutter handle, the brief overview of weapon systems above, which have certain disadvantages along with the advantages, we offer, in our opinion, a more perfect solution to the operation of automation in comparison with weapons, the automation of which is based on the recoil all weapons. In this regard, in weapons preferably with a long barrel, it is advisable to use the handle not only for manual reloading of the weapon, but also as the dominant inertial element of its head in the front extreme position in the group of automation parts that unlock the bolt. After that, the shutter in the composition of the mobile system by the pressure of the powder gases is discarded to its original - extreme rear position. We do not have analogues that allow us to use the shutter handle as it is presented above. However, taking into account the similarity, the inertia predominance of its head part when unlocking the shutter, and also dropping it to its original - extreme rear position by the pressure of powder gases, we took it as a prototype. It is represented by the design of Mauser, where the inertial body only unlocks the shutter, and it is discarded by the pressure of the powder gases remaining in the barrel bore by the time it is unlocked. To do this, it is necessary that the inertial body has time to unlock the shutter before the action of powder gases ends (Blagonravov A.A .-- Material part of small arms, book 1., M., 1945, p. 49).

Thus, we can conclude that when firing due to recoil of all weapons, the inertial body of the prototype moves by inertia relative to it in the direction of the bullet’s flight, compressing the spring, and the bolt is unlocked when the inertia body moves under the action of an expandable spring in the direction of the recoil of all weapons. Therefore, when firing, the prototype shutter unlocks in two stages - with a long time interval between the shot and the shutter unlocking, which can lead to a decrease in the pressure of the powder gases in the barrel below the required value for the automatic weapons to work.

The prototype, like the systems noted above, with the return of all weapons have a common drawback. For example, with a rigid support - shooting from a machine gun, the recoil of all weapons will be completely or to a greater extent eliminated by the reaction of this support, which will cause delays in the operation of automation, and even a complete failure. In addition, weapons of this type, with relatively low weight, will respond more to recoil in the absence of support - shooting from the hand, which, apparently, will not add convenience to the shooter. Therefore, in order to exclude the dependence of the operation of automation on the influence of the recoil of all weapons in the proposed mechanism of the half-free shutter, the handle is made with the possibility of inertia of its head part in the front extreme position after the shutter stops. With a relatively small weight of the handle due to the shoulder forming the lever and the displacement of the center of gravity towards its head part when the mobile system stops in the front extreme position, its head part inertia moves radially in acceleration in the direction of the bullet’s flight, forming an angle with respect to the frame and pusher handles, and after the shot actuates the parts that unlock the shutter. They reduce the pressure of the powder gases in the channel of the barrel of the weapon and, in this regard, weaken the self-braking of the combat stop of the bolt in the support neck of the receiver, unlock the bolt, which, as part of the mobile system, is discarded by the pressure of the powder gases longer than in the long barrel to the original - extreme rear position.

Consequently, the handle performs a dual function - reloading, and most importantly - in the front extreme position, after the shot, in one step it activates the parts unlocking the bolt from the condition of reliable operation of the weapon automation, which distinguishes it from the prototype and the known one.

In addition, when using the handle in our device, the unlocking of the shutter occurs ahead of the curve in comparison with the prototype. In this regard, the energy of the powder gases, aimed at discarding the mobile system, will cushion and weaken the recoil of all weapons, which will contribute to greater stability of the weapon during firing.

Locking the bore with a bolt in some weapon systems is carried out by skewing it in a vertical or horizontal plane by a stand made integrally with the bolt frame. Interacting with the corresponding surface of the bolt, the rack moves its combat support to the corresponding support cutout of the receiver and the subsequent movement initiates a shot (Blagonravov A.A. - Machine gun Z B - 26; Easel machine gun Goryunova - SG - 43. Material of small arms, pr 2, M., 1946, pp. 42-52, 766-768).

In the proposed device, there is a similar action of the rack with respect to the shutter, which is twisted in a vertical plane with the input of the combat stop of the shutter in the reference cutout of the receiver, initiating a shot, in our case, also from the condition of its self-braking at the maximum pressure of powder gases in the barrel. But besides this, the stand is also intermediate - in the group of parts that unlock the shutter. For the subsequent action of the part unlocking the shutter, the stand is placed in the frame for moving together with the frame in the longitudinal direction, and with respect to the frame in the transverse direction, for unlocking the shutter with the finger of the disconnector.

So, when the frame stops in the front extreme position, after locking the shutter and initiating a shot, under the action of the pusher, the handle moves in the transverse direction, opening the access to the grip by the disconnector finger, and it reduces the pressure of the powder gases, which weakened the self-braking of the bolt stop in the support section of the barrel boxes, unlocks the shutter.

Thus, it is evident that the resistant function is not only to lock the shutter and initiate a shot, but also to participate in a group of parts that unlock the shutter, which distinguishes it from the known.

The details noted above cannot function outside the receiver of a weapon, which in its system takes not the last place. It is connected to the barrel, has a window for the supply of cartridges, in systems with a bolt lock, a support cutout for it. Serves for placing and directing the mobile weapon system, attaching the trigger to it, in some systems - shoulder rest.

In the device we offer, the receiver is represented by the components noted above. But, unlike the literature known to us, in the receiver there is a pocket with a flat and inclined surface with the possibility of receiving the rack in it in the front extreme position of the movable system, and when the rack is thrown to its extreme rear position by the action of powder gases, it leaves the pocket during interaction racks with an inclined surface, a disconnector finger and a handle pusher.

Thus, the receiver has an additional function — receiving and returning to the initial position the rack, and through it the handle, which distinguishes it from the known one.

In the literature on automatic weapons systems known to us, the launch frames (in our description, the trigger unit, in order to avoid confusion with the slide frame) have elements that cover the receiver from the bottom and the back. They include trigger, return or return-fighting mechanisms, shoulder support butt, pistol grip for fire control, translators that change the mode of fire, fuses.

In our device, the trigger block conditionally corresponds to the presence of the above elements. But, besides this, in connection with the presence of some parts that determine the specifics of automation and the design of elements, new conditions for the interaction of parts are created. So, when the shutter is discarded by the action of powder gases, the end face of the plane, when interacting with the accelerator, slows down the shutter rollback when a larger frame speed is reported. A similar slowdown of the recoil of the shutter was noted in the automatic weapon systems - “Neigauzen carbine-machine gun”, “Famas” assault rifle (AB Zhuk, in the book “Rifles and assault rifles”, M., 1987, p. 116, 183). The presence in the plane of the cutout, when the tail interacts with its face, allows the tail to move the uncoupling finger to a position close to the initial one with a certain pressure of the reciprocating spring through the rod, which also slows down the rollback of the mobile system to the rear position.

This is due to inhibition when overcoming the friction of the tail against the edge of the notch, as well as the necessary effort to overcome the resistance to the applied force to the smaller lever to overcome the larger one, which is reinforced through the rod with a return-fighting spring.

Therefore, the trigger block is made with a plane and a cutout and with the possibility of the interaction of the end face of the plane with the accelerator, and the cutout of the plane with the tail of the disconnector to slow the rollback of the mobile system to its extreme rear position when it is discarded by the action of powder gases.

It can be concluded that the semi-free shutter mechanism, which preferably contains a long barrel, a shutter, an accelerator, a frame, a handle, a receiver, a trigger block, a reciprocating spring, designed to move the movable system and the parts interacting with it, has novelty.

So, in order to exclude the dependence of the operation of automation on the impact of the recoil of all weapons, the handle is pivotally connected with its base to the frame and is made with the possibility of inertia of its head part in the front extreme position after the shutter stops moving radially with acceleration with the formation of an angle relative to the frame, in the direction the flight of a bullet unlocking the bolt immediately after a shot; for the sequential action of the part unlocking the shutter, the stand is placed in the frame for moving together with the frame in the longitudinal direction, and with respect to the frame in the transverse for unlocking the shutter with the finger of the disconnector; for receiving and returning to the initial position of the rack and the handle in the receiver, a pocket is made with a flat and inclined surface with the possibility of receiving the rack in it in the front extreme position of the movable system, and when the rack is thrown to its extreme rear position by the action of powder gases - exit the pocket when interacting racks with its inclined surface, disconnector finger and handle pusher; to slow down the rollback of the mobile system when it is thrown to its extreme rear position by the action of powder gases, the trigger block is made with a plane and a cutout and with the possibility of the interaction of the end of the plane with the accelerator, and the cut of the plane with the tail of the disconnector.

The essence of the invention is illustrated by drawings.

I. Mobile system - details

Figure 1. Shutter-1 has: a cup-2, a striker with a striker-3, an ejector-4, a rammer-5, a reflector channel-6, guiding projections-7, a combat stop-8, a ledge-9, a capture-10, an accelerator-11, holes-12, axis-13.

Figure 2. Frame 14 has: longitudinal-15 and transverse-16 through cuts, guide projections-17,18, on one side of the enlarged size-18, cut-out 19 for the base of the handle-34 and a hole-20 for its axis, window-21, cut-out -22, hole-23, protrusion-24, combat platoon-25.

Rack-26 has: lift-27, tongue-28, bevel-29.

Disconnector-30 has: finger-31, tail-32, stock-33, axis 37.38.

The handle-34 has: emphasis-35, pusher-36, axis-39.

II. Assembly of parts of the mobile system

Accelerator-11 is connected to the shutter-1 by means of axis-13 through openings-12; disconnector-30 is installed in frame-14 on axis-37 in hole-23 with axis-38 connected to it by rod-33. After that, the shutter-1 is combined with the frame-14 in its transverse cutout 16 by applying a gripper-10 to the protrusion-24, from the condition of the movable connection of the shutter-1 with the frame 14; the next detail is stand-26, its tongue-28 is inserted into window-21, and the rest is placed in neckline-22. At the same time, bevel-29 is turned towards finger-31 of disconnector-30.

Figure 3. Receiver-40 accommodates all the details of the device. It has: a window-41 for feeding cartridges, a support cut-out 42, longitudinal grooves-43.44 and a longitudinal space-45 for moving the guide projections -7.17 and 18, respectively, of the shutter-1 and the frame-14, and also has "Pocket" -46 with a flat and inclined surface for moving into it some part of the body of the rack-26. Located on the right side of the receiver-40 "tide" -47 allows passage into the longitudinal space-45 of the guiding protrusions-18 of the frame-14 and the articulation of the handle-34 in them with the axis-39 through the larger hole-48 of the receiver-40.

The barrel is one of the main elements of firearms, the automation of which, along with other conditions, depends on its length. In this regard, for the normal functioning of the proposed mechanism of the semi-free shutter, a longer barrel is preferable. In our drawing, it is part of the receiver -40 is designated conventionally by the number -49.

Figure 4. The trigger block-50 provides the functioning of the parts of the device. It has a plane-51, which at the same time is the cover of the receiver-40, covering it from below, where the sear-52 is placed and there is a cut-53 for the tail-32 of the disconnector-30. The trigger block-50 is combined with the receiver-40 through its protrusions-54 and grooves-44 of the receiver-40. The butt-55 of the plane-51 is the basis for interaction with the shutter-1 accelerator-11, and the space formed between it and the breech section of the barrel-49 serves to eject spent cartridges.

The recoil pad-56, when combining its protrusions-57.58 with the notch of the longitudinal space-45 and the groove-43 of the receiver-40, ensures its locking from the back with fixing by a stopper through the hole-59. It is possible to fasten to it - butt-62 with the placement of the tube-60 and reciprocating spring-61 in it, and to the plane-51 - of the pistol grip with a trigger, as conditionally shown in Figures 4 and 5 "A".

III. INTERACTION OF PARTS

Figure 5. Consecutive provisions

"A" - initial - Movable system - shutter-1 and frame-14 in a snap with parts that make up them, are placed in the receiver-40, closed by the trigger-50. The system was moved to its extreme rear position behind the 34 handle and mounted on a 25 platoon before firing from the “rear” sear-52. At the same time, the shutter-1 and its components - the drummer with the striker-3, the accelerator-11 do not experience pressure on them from the side of the frame-14, and its capture-10 in free contact with the protrusion-24, frame-14, because it is held by an axle-52 for a platoon-25. The reciprocating spring-61 in a compressed state transfers force through the rod-33 to the disconnector-30, which finger rests on the body of the rack-26 with finger-31.

“B” - when the trigger is pulled, the sear-52 and frame-14 are recessed, freed from communication with it, pushes the shutter-1 when its shoulder-9 comes in contact with the ledge-9 and the lift-27 of the rack-26 . The shutter-1 with the rammer-5 sends the cartridge into the chamber of the barrel-49, with the ejector-4 it captures by its edge and stops at the edge of the barrel-49. The continued movement of the frame-14 with respect to the shutter-1 during the interaction of the ledge-9 of the shutter-1 and the elevator-27 of the rack-26 introduces the combat stop-8 of the shutter-1 into the reference cut-42 of the receiver-40; the inclined planes of the frame-14, when interacting with the accelerator-11, change its position from horizontal to inclined with the withdrawal of its front part - along the space between the breech section of the barrel-49 and the butt-55 of the launch block-50; the stand-26 hits the firing pin with the striker-3, initiating a shot when the barrel-49 is locked from the condition of self-braking of the combat stop-8 of the shutter-1 in the support neck-42 of the receiver-40 with high pressure of the powder gases in the first shot period. Thus behind the stopped shutter-1 frame-14 stops.

“B” - in the extreme forward position - when the shutter-1 and frame-14 stop, after the shot, the handle-34, pivotally connected by the axis 39 to its base with frame-14 from the condition of moving its head part by inertia with acceleration in the radial direction the flight of the bullet, forms an angle with respect to the frame-14. At the same time, pusher-36 displaces tongue-28 of rack-26 from window-21, and its body — from cut-out-22 to “pocket” -46 of receiver-40, freeing access to finger-31 of disconnector-30 to capture-10 of the shutter- one. In this case, tail-32 of disconnector-30 is lowered into notch-53 of plane-51 of trigger block-50. Under the action of finger-31 of disconnector-30, reinforced by a return-fighting spring-61 through the rod-33, the gripper-10 moves downward from the exit condition of the combat stop-8 of the shutter-1 along the tangent from the reference cut-out-42 of the receiver 40, completing the unlocking of the shutter -one. This moment occurs when the pressure of the powder gases in the long barrel-49 is reduced, which weakened the self-braking of the combat stop-8 of the shutter-1 in the support neck-42 of the receiver-40, but sufficient to discard the shutter-1 in the mobile system to its original extreme rear position .

IV. RETURN OF THE MOBILE SYSTEM TO THE ORIGINAL - EXTREME REAR POSITION under the influence of powder gases occurs during the interaction of the parts making it up. So, when moving the shutter-1, the accelerator-11, interacting with the end-55 of the trigger block-50, according to the lever principle, reports the acceleration to the movement of the frame-14 with respect to the shutter-1, slowing its departure. At the same time, the tail-32 of disconnector-30, interacting with the edge of cut-out-53, is removed from it, communicating the movement of rod-33 through the shoulder of disconnector-30, pressing the return-fighting spring-61, and finger-31 leaves the space previously formed by the tongue -28 rack-26 with the lateral movement of the latter in the "pocket" -46 receiver-40. Further movement of the rack-26 body in the "pocket" -46 on a flat, and then on an inclined surface with the exit from the "pocket" determines its initial position. In this case, the tongue-28 of the rack-26 through the pusher-36 returns the handle-34 to its original position - until the stop-35 contacts the frame wall 14 in the guide protrusion-18. Bevel-29 of rack-26 fixes finger-31 of disconnector-30, depriving tail-32 of contact with plane-51 of trigger block-50.

The firing sleeve is conventionally removed from the receiver-40 reflector through the space formed by the end face-55 of the launch block-50 and the breech of the barrel-49.

The mobile system, having reached its extreme rear position, squeezing the reciprocal-fighting spring-61, becomes on the cocking-25, held by sear-52, i.e. will occupy the original position indicated in Figure 5 "A".

In the case of a recessed sear-52, when you pull the trigger, the mobile system will operate in automatic mode.

Thus, there is a fleeting change of position of the parts, and most importantly, a reliable locking of the barrel channel is ensured, without releasing the shutter-1 at the very beginning of the shot, and unlocking it is in a favorable mode with a reduced pressure of powder gases in the barrel from a condition sufficient for the automation to function weapons.

In addition to the graphic image - photographs of the details of the mechanism of the semi-free shutter separately, assembled and as part of a conventional weapon.

Claims (4)

1. The mechanism of the semi-free shutter of an automatic weapon containing a long barrel, bolt, accelerator, frame, handle, receiver, trigger block, reciprocating spring, designed to move the mobile system and its associated parts, characterized in that the handle is articulated by its the base with the frame and is made with the possibility of inertia of its head part in the front extreme position after the shutter stops moving radially with acceleration, with the formation of an angle with respect to the frame, for example occurrence flight bullets and unlocking the gate immediately after the shot. 2. The mechanism of the half-free shutter according to claim 1, characterized in that it is equipped with a stand placed in the frame for moving it together with the frame in the longitudinal direction, and with respect to the frame in the transverse direction, for unlocking the shutter with the finger of the disconnector. 3. The mechanism of the semi-free shutter according to claim 1 or 2, characterized in that the receiver has a pocket with a flat and inclined surface, with the possibility of receiving the racks in it in the front extreme position of the movable system, and when the rack is thrown to the extreme rear position by the action of powder gases - exit the pocket when the rack interacts with its inclined surface with the uncoupling finger and the handle pusher. 4. The mechanism of the half-free shutter according to claim 1 or 2, characterized in that the trigger block is made with a plane and a cutout and with the possibility of interaction of the end face of the plane with the accelerator, and the cutout of the plane with the tail of the disconnector to slow the rollback of the mobile system to its extreme rear position when it throwing away by the action of powder gases.

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