A firearm is disclosed. The firearm contains a lower receiver containing a first opening, wherein the first opening is configured to accommodate a firing mechanism, an upper receiver removably coupled with the lower receiver, a barrel removably coupled with the upper receiver, a bolt carrier assembly positioned within the upper receiver, wherein the bolt carrier assembly is movable between a locked position and an unlocked position, wherein the bolt carrier assembly contains a rear surface, wherein the rear surface of the bolt carrier assembly is positioned between the barrel and the first opening when the bolt carrier assembly is in the locked position.

A forward charging system is disclosed. The forward charging system contains a charging trolley containing one or more channels configured to accommodate one or more rails associated with a hand guard, wherein the charging trolley is movable along the one or more rails between a rest position and a charging position, and a rod coupled to a rear portion of the charging trolley, the rod is configured to move a bolt carrier assembly away from a locked position when the charging trolley is moved away from the rest position.

A forward charging system is disclosed. The forward charging system contains a charging trolley containing one or more channels configured to accommodate one or more rails associated with a hand guard, wherein the charging trolley is movable along the one or more rails between a rest position and a charging position, and a rod coupled to a rear portion of the charging trolley, the rod is configured to move a bolt carrier assembly away from a locked position when the charging trolley is moved away from the rest position.

A forward charging system is disclosed. The forward charging system contains a charging trolley containing one or more channels configured to accommodate one or more rails associated with a hand guard, wherein the charging trolley is movable along the one or more rails between a rest position and a charging position, and a rod coupled to a rear portion of the charging trolley, the rod is configured to move a bolt carrier assembly away from a locked position when the charging trolley is moved away from the rest position.

A forward charging system is disclosed. The forward charging system contains a charging trolley containing one or more channels configured to accommodate one or more rails associated with a hand guard, wherein the charging trolley is movable along the one or more rails between a rest position and a charging position, and a rod coupled to a rear portion of the charging trolley, the rod is configured to move a bolt carrier assembly away from a locked position when the charging trolley is moved away from the rest position.

A sliding action for riles having an upper and a lower receiver in which the firing mechanism is totally installed OEM in the lower receiver, including a disconnector mechanism, and is fed by magazine. The OME gas operating system is removed, thus eliminating the semi-automatic mode feature, and substitutes the operating system by a Slide Action assembly having a kinematic chain of individually joint parts, which when assembled establish a solid array with one degree of freedom as a whole, and moving reciprocatingly along a path parallel to the barrel. The invention incorporates a structural guiding tube and supports to prevent buckling of the chain; a handguard; a sliding mobile forend with a polygonal open concave, symmetrical shape incorporating the guides for the sliding mobile forend. An external locking mechanism, installed in the forend locks the Slide Action against the grounded handguard. A driver clamp connects externally the Sliding chain.

The invention relates to a firearm comprising: a housing (1) having a receptacle (2) for several cartridges or for a magazine with cartridges: a barrel unit (3) which is located in the housing (1) and has a barrel (4) and a cartridge chamber (6): a breechblock (8), which can be moved relative to the housing (1) and is biased in the firing direction by means of a return spring (7), for conveying cartridges into the cartridge chamber (6) or cartridge cases to an ejection port; and a gas braking device which is located in the housing (1) and comprises a cylinder (9) which is positioned parallel to the barrel (4) and which is connected to the interior of the barrel (4) via a gas extraction opening (10); and a piston (11) which can be moved inside the cylinder (9) and which is coupled to the breechblock (8). The breechblock (8) is located in a breechblock carrier unit (12) which is located completely inside the housing (1) over the entire movement path while a shot is being fired and during a reloading operation, the breechblock carrier unit (12) comprising the breechblock (8) itself, two connecting sections (13) guided parallel to the barrel (8) in the housing (1), and a coupling section (14) to be coupled with the piston (11) of the gas braking device.

An upper receiver is disclosed. The firearm contains a bolt carrier assembly positioned within the upper receiver, a recoil spring guide rod, wherein the bolt carrier assembly is configured to slide along the recoil spring guide rod between a locked position and an unlocked position, and a first recoil spring, wherein the recoil spring guide rod is positioned within the first recoil spring.

An upper receiver is disclosed. The firearm contains a bolt carrier assembly positioned within the upper receiver, a recoil spring guide rod, wherein the bolt carrier assembly is configured to slide along the recoil spring guide rod between a locked position and an unlocked position, and a first recoil spring, wherein the recoil spring guide rod is positioned within the first recoil spring.

A forward charging system is disclosed. The forward charging system contains a charging trolley containing one or more channels configured to accommodate one or more rails associated with a hand guard, wherein the charging trolley is movable along the one or more rails between a rest position and a charging position, and a rod coupled to a rear portion of the charging trolley, the rod is configured to move a bolt carrier assembly away from a locked position when the charging trolley is moved away from the rest position.