A self-locking bolt assembly is provided having a short stroke allowing the assembly to be contained within the receiver. The assembly has a base plate, a recoil rod with a spring, a bolt body, a bolt and a locking mechanism. The bolt is internally (i.e. lockable onto itself) lockable when the bolt is in battery. The locking mechanism, for example, can be a roller bearing, a lever lock, a cam rotary lock or a roller. The locking mechanism engages to recoil rod and prevents rearward motion of the bolt. Blowback and reciprocation of the bolt are temporarily delayed after a shot is fired until after the bolt is unlocked. Rearward movement of the bolt body due to inertia causes the locking mechanism to be disengaged to unlock the bolt and to allow for reciprocation of the bolt.

A self-locking bolt assembly is provided having a short stroke allowing the assembly to be contained within the receiver. The assembly has a base plate, a recoil rod with a spring, a bolt body, a bolt and a locking mechanism. The bolt is internally (i.e. lockable onto itself) lockable when the bolt is in battery. The locking mechanism, for example, can be a roller bearing, a lever lock, a cam rotary lock or a roller. The locking mechanism engages to recoil rod and prevents rearward motion of the bolt. Blowback and reciprocation of the bolt are temporarily delayed after a shot is fired until after the bolt is unlocked. Rearward movement of the bolt body due to inertia causes the locking mechanism to be disengaged to unlock the bolt and to allow for reciprocation of the bolt.

An automatic firearm having an inertial automation system comprises a barrel, which is movable along its own axis, a bolt support with a bolt, a recoil spring, a buffer spring and a hammer spring, a trigger mechanism, an ammunition feed mechanism, a mechanism for coordinating the actual firing, and a bolt support latch. The springs and the mechanism for coordinating the actual firing ensure a constant-value recoil force during automatic fire. Technical result consists in the improvement of the shooter's operating conditions, reduced vibration, and decreased bullet dispersion.

Disclosed is a firearm configuration for a handgun. The firearm configuration is designed to reduce the recoil forces encountered by a user upon firing the weapon. It further includes a recoil plate that absorbs forces generated by the slide during firing. Recoil forces are reduced by lowering the firearm's center of mass and by aligning a recoiling mass with the user's arm and trigger finger. The firearm configuration further includes a locking block which prevents rotational and lateral movement of the barrel upon firing.

A semiautomatic or fully automatic firearm that includes a barrel, the rear barrel end whereof is in the form of a cartridge chamber into which a cartridge can be inserted, a breech body which is arranged such that it can move in the longitudinal direction between an open position, which releases the cartridge chamber for the reloading of a cartridge, and a closed position which closes the cartridge chamber, wherein the breech body closes the cartridge chamber at the rear in the closed position and is used as a support for the cartridge case of the cartridge, wherein the firearm has a mass simulation body which is in force-fitting engagement with the breech body, in particular a mass simulation body which is rigidly connected to the breech body, the mass simulation body being formed at least in part from a magnetizable or a magnetic material.

A firearm reliability system may include a charging handle insert and a variable bolt weight assembly. Other components of a firearm reliability system may include, but are not limited to, a buffer pressure plug, extractor springs, firing pin springs, one or more firing pins, and bolt buffers. The firearm reliability system may address weaknesses in the common rimfire AR bolt system. Using the firearm reliability system, malfunctions may be essentially eliminated. Each component of the firearm reliability system plays a part and interfaces with the others (i.e., the bolt weight spreads the impact on the buffer into a larger area, while reducing the speed at which the bolt impacts the backplate, which then reduces the energy transferred to the buffer pressure plug and thus the impact with the lower receiver).

A semiautomatic or fully automatic firearm that includes a barrel, the rear barrel end whereof is in the form of a cartridge chamber into which a cartridge can be inserted, a breech body which is arranged such that it can move in the longitudinal direction between an open position, which releases the cartridge chamber for the reloading of a cartridge, and a closed position which closes the cartridge chamber, wherein the breech body closes the cartridge chamber at the rear in the closed position and is used as a support for the cartridge case of the cartridge, wherein the firearm has a mass simulation body which is in force-fitting engagement with the breech body, in particular a mass simulation body which is rigidly connected to the breech body, the mass simulation body being formed at least in part from a magnetizable or a magnetic material.

In the fixed frame it has a base, in which a barrel with the axis below the level of the upper edge of the shooter's hand, a trigger, a buffer and a long ejector are attached. A pistol grip with a cartridge magazine is obliquely slid into the frame and attached. A semi-embedded moving slide, containing especially a closed launch pad, a firing pin, an obliquely placed extractor and a rob of the trigger mechanism, is inserted into the frame from above. The slide is covered from above by upper body attached to the barrel and at two points to the frame, which carries sights at the top and has elements of the hammer system placed on the lower side.

In the fixed frame it has a base, in which a barrel with the axis below the level of the upper edge of the shooter's hand, a trigger, a buffer and a long ejector are attached. A pistol grip with a cartridge magazine is obliquely slid into the frame and attached. A semi-embedded moving slide, containing especially a closed launch pad, a firing pin, an obliquely placed extractor and a rob of the trigger mechanism, is inserted into the frame from above. The slide is covered from above by upper body attached to the barrel and at two points to the frame, which carries sights at the top and has elements of the hammer system placed on the lower side.

An automatic firearm having an inertial automation system comprises a barrel, which is movable along its own axis, a bolt support with a bolt, a recoil spring, a buffer spring and a hammer spring, a trigger mechanism, an ammunition feed mechanism, a mechanism for coordinating the actual firing, and a bolt support latch. The springs and the mechanism for coordinating the actual firing ensure a constant-value recoil force during automatic fire. Technical result consists in the improvement of the shooter's operating conditions, reduced vibration, and decreased bullet dispersion.