AUTOMATIC ARMS Russian patent published in 2010 - IPC F41A3/26 F41A5/24 

FIELD: weapons and ammunition.

SUBSTANCE: arms contain barrel fixed in casing and frame with breech mechanism, which is installed in casing. Frame has shaped slot interrelated to drive protrusion of the breech mechanism. The latter is equipped with firing protrusions, gas chamber and gas piston with the striker attached to the frame; at that, movable assemblies are mounted in the casing concentrically relative to each other, coaxially with the barrel and are spring-loaded. Arms include the follower located mainly on the barrel so that it can interact at least with one of firing protrusions of breech mechanism. Gas chamber of breech mechanism is extended so that there formed is annular pocket and front wall in which there are channels directed towards the barrel. Drive protrusion of the breech mechanism has the platform supported at longitudinal movement of the breech mechanism on the appropriate platform of shaped slot of the frame. Shaped slot of the frame is equipped with deactivated fixing mechanism installed with possibility of interacting with inner surface of casing equipped with an opening and longitudinal slot made in the breech mechanism. Arms contain the bush which is installed in rear part of the frame coaxially with the breech mechanism with possibility of interacting with the breech mechanism and casing.

EFFECT: reliable operation of automation system and latching system.

4 cl, 6 dwg