A slide stop lever adapted to be disposed in a gun body, and has a pivoting section adapted to be pivoted to the gun body, and a latching section extending rearwardly from the pivoting section. The latching section has a rod portion extending rearwardly from the pivoting section, a latching portion protruding from the rod portion, and a pushed portion protruding from the rod portion and located lower than a top of the rod portion. The pushed portion is adapted to be pushed upwardly to move the latching section upwardly from an initial position to an abutment position, where the latching portion is adapted to be received in a latching groove of the Glock 43 series slide to prevent forward sliding movement of the Glock 43 series slide.

A slide stop lever adapted to be disposed in a gun body, and has a pivoting section adapted to be pivoted to the gun body, and a latching section extending rearwardly from the pivoting section. The latching section has a rod portion extending rearwardly from the pivoting section, a latching portion protruding from the rod portion, and a pushed portion protruding from the rod portion and located lower than a top of the rod portion. The pushed portion is adapted to be pushed upwardly to move the latching section upwardly from an initial position to an abutment position, where the latching portion is adapted to be received in a latching groove of the Glock 43 series slide to prevent forward sliding movement of the Glock 43 series slide.

The present invention provides a pistol with a frame having a rear grip, a trigger facility forward of the grip and an upper surface. An elongated slide is connected to the frame and operable to reciprocate along the upper surface. The frame defines a rear recess open at the upper surface. An insert is included having a major portion removably received in the rear recess and having a frame rail extending from the major portion above the upper surface. The frame rail is adapted to connect with the slide to constrain reciprocation.

The present invention provides a pistol with a frame having a rear grip, a trigger facility forward of the grip and an upper surface. An elongated slide is connected to the frame and operable to reciprocate along the upper surface. The frame defines a rear recess open at the upper surface. An insert is included having a major portion removably received in the rear recess and having a frame rail extending from the major portion above the upper surface. The frame rail is adapted to connect with the slide to constrain reciprocation.

An improved bolt and bolt carrier with integral gas key having an extension nozzle threadedly secured and pinned to the gas key for use with a direct gas operated firearm is provided. The extension nozzle is designed to receive a portion of the host firearm's gas operating system. The firing pin retaining pin is oriented so as to expose its widest profile to the firing pin's annular flange, increasing its service life. The bolt has a plurality of lugs extending from its forward end. The extractor recess is constructed so that the face of the bolt is round and the adjacent lugs fully supported. The extractor engages approximately 17% more of a seated ammunition cartridge's rim as compared to the prior art AR15/M16 extractor. The result is an improved bolt and bolt carrier which provides for increased operational reliability.

An improved bolt and bolt carrier with integral gas key having an extension nozzle threadedly secured and pinned to the gas key for use with a direct gas operated firearm is provided. The extension nozzle is designed to receive a portion of the host firearm's gas operating system. The firing pin retaining pin is oriented so as to expose its widest profile to the firing pin's annular flange, increasing its service life. The bolt has a plurality of lugs extending from its forward end. The extractor recess is constructed so that the face of the bolt is round and the adjacent lugs fully supported. The extractor engages approximately 17% more of a seated ammunition cartridge's rim as compared to the prior art AR15/M16 extractor. The result is an improved bolt and bolt carrier which provides for increased operational reliability.

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.

The present invention provides a pistol with a frame having a rear grip, a trigger facility forward of the grip and an upper surface. An elongated slide is connected to the frame and operable to reciprocate along the upper surface. The frame defines a rear recess open at the upper surface. An insert is included having a major portion removably received in the rear recess and having a frame rail extending from the major portion above the upper surface. The frame rail is adapted to connect with the slide to constrain reciprocation.

The present invention provides a pistol with a frame having a rear grip, a trigger facility forward of the grip and an upper surface. An elongated slide is connected to the frame and operable to reciprocate along the upper surface. The frame defines a rear recess open at the upper surface. An insert is included having a major portion removably received in the rear recess and having a frame rail extending from the major portion above the upper surface. The frame rail is adapted to connect with the slide to constrain reciprocation.

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.