An ambidextrous bolt catch having at least some of a bolt release lever having a bolt release projection, wherein the bolt release lever is rotatable between an engaged position and a disengaged position; and a bolt catch having a bolt catch recess, wherein at least a portion of the bolt release projection is received within at least a portion of the bolt catch recess, wherein the bolt catch is rotatable between an engaged position and a disengaged position, and wherein rotational movement of the bolt release lever produces rotational movement of the bolt catch, via interaction of at least a portion of the bolt release projection and at least a portion of the bolt catch recess.

A bolt stop actuator is disclosed. The actuator may include a lift arm, a first leg extending from a point proximate to an end of the lift bar and generally perpendicular therefrom, a second leg extending in the same direction from the lift bar as the first leg, and a projection extending from the lift bar and configured to contact a follower of an empty magazine when the bolt stop actuator is assembled into a firearm. Neither the first leg, nor the second leg, include apertures positioned distal to the lift arm.

A firearm as disclosures herein comprises a main receiver body, a barrel, a breech bolt structure, a buffer assembly, a trigger group assembly, a bolt catch and at least one of an auto-sear, a magazine adapter and a breech bolt anti-rotation structure. The main receiver body is preferably of a monolithic construction whereby the handguard and breech bolt carrying bore can be manufactured from a single piece of material. The auto-sear is tripped by engagement with a buffer of the buffer assembly. The magazine adapter has an exterior surface structure engaged with a mating interior surface structure of a magazine well space of the main receiver body. A distal end portion of the breech bolt anti-rotation structure is engageable by the buffer for limiting forward travel of the buffer when the barrel is detached from the main receiver body.

A bolt stop actuator is disclosed. The actuator may include a lift arm, a first leg extending from a point proximate to an end of the lift bar and generally perpendicular therefrom, a second leg extending in the same direction from the lift bar as the first leg, and a projection extending from the lift bar and configured to contact a follower of an empty magazine when the bolt stop actuator is assembled into a firearm. Neither the first leg, nor the second leg, include apertures positioned distal to the lift arm.

The inventive technology is directed to a bolt hold-open system configured to lock the bolt of an AK-47 firearm, or variants of the AK-47, in an open position after the last cartridge in a magazine has been ejected.

A rifle has a fixed main body, including a barrel, a receiver with an upper opening, and a breech element. A trigger group is at least partially housed in the receiver, including a trigger, a hammer device operable by the trigger, and a safety member positionable in a shooting position, disengaged from the hammer device and in a safety position, engaged with and blocking the hammer device. A carriage assembly with a shutter group is positioned on the receiver at the upper opening and axially movable by the user between an advanced shooting configuration and a retracted rearming configuration. The carriage assembly includes a safety group controllable by the user, with the carriage assembly in the advanced configuration, in a ready-to-shoot configuration, in which it is disengaged from the safety member, and a safety configuration, in which it engages and keeps the safety member in the safety position.

One example control element for controlling a breechblock stop lever that can move about a first axis of rotation, which can be moved between a standby position for releasing a breechblock carrier and a retaining position for retaining the breechblock carrier, includes a first arm (15) that can rotate about a second axis of rotation (B), a first control section on the first arm, the first control section including a first contact surface (11a) and a second contact surface (11b) facing away from the first contact surface (11a), which can be rotated about the second axis of rotation (B) for the control element (10) by a control curve (36, 37, 38) on the breechblock carrier (30); and a second control section (13) on the first arm, wherein the second control section can be controlled by a control surface (55a) on a trigger (50). Other examples are possible.

One example control element for controlling a breechblock stop lever that can move about a first axis of rotation, which can be moved between a standby position for releasing a breechblock carrier and a retaining position for retaining the breechblock carrier, includes a first arm (15) that can rotate about a second axis of rotation (B), a first control section on the first arm, the first control section including a first contact surface (11a) and a second contact surface (11b) facing away from the first contact surface (11a), which can be rotated about the second axis of rotation (B) for the control element (10) by a control curve (36, 37, 38) on the breechblock carrier (30); and a second control section (13) on the first arm, wherein the second control section can be controlled by a control surface (55a) on a trigger (50). Other examples are possible.

The inventive technology is directed to a bolt hold-open system configured to lock the bolt of an AK-47 firearm, or variants of the AK-47, in an open position after the last cartridge in a magazine has been ejected.

The inventive technology is directed to a bolt hold-open system configured to lock the bolt of an AK-47 firearm, or variants of the AK-47, in an open position after the last cartridge in a magazine has been ejected.