Automatic weapon kalashnikov assault rifle

摘要

The invention relates to hand automatic firearms. The weapon comprises a receiver (1) in which a trigger and firing mechanism and a locking mechanism are installed. The trigger and firing mechanism comprises a firing hammer (20) and a sear of the autosafety with an automatic sear notch (21). The locking mechanism comprises a turning bolt (8) and a bolt support (10) with a rear lug interacting with the firing hammer (20). On the receiver (1) a butt (3) is installed on a hinge, and at the front part there is a barrel (2) with a gas-escape mechanism. The novelty of the claimed automatic weapon is that the bolt support (10) is made in such a way that it can interact with the tapered supporting surface of the receiver (1). The rear lug is made in such length which eliminates contact of the firing hammer (20) with the firing rod (9) when the bolt support (10) recoils. The rod (12) is installed in the bolt support in such a way that a limited angular turning is allowed, for example, on the threading with a clearance. The gas tube (6) has a lug (17) which contacts with the slot (18) of the rear-sight bed (4) and is spring-loaded in the direction of the muzzle end. The sear (21) is made with a platform (23) of the autosafety and a platform (22) of the hand reloading sear notch providing guaranteed contact of the bolt support (10) and the firing hammer (20) under hand reloading and a guaranteed clearance between them under automatic fire. In the butt there are reinforcing ribs (30) which form a trap (31) for the box (32) with accessories closed by a spring-loaded turning cap (34) installed in such a way that it can interact with the pusher (27) of the retainer (29) of the stowed position. In the rifled portion of the barrel (2) transition from the land to the bottom of rifling is made in the form of two conjugating radii and a tangent located perpendicularly to the plane passing through the bore axis of the barrel (2) and the centre of the land. In the barrel (2) between the conic taper of the lands (42) and the rifled portion an additional conic area (43) is made.