FIREARM Russian patent published in 2015 - IPC F41A19/00 F41C3/00 

FIELD: weapon and ammunition.

SUBSTANCE: firearm contains automatic mechanism box with an insert, a trunk, a lock, a barrier frame, a shock and trigger mechanism with a trigger. In the automatic mechanism box on an axis the lock release spring with two free shoulders for interaction with the lock and the trigger axis is installed. In the box insert the hole for passing of one spring shoulder is implemented, in the trigger bushing a chamfer is made, and on the trigger axis a cross flute (a radial groove) under the chamfer for passing of another spring shoulder is made.

EFFECT: improvement of firmness of elements of locking unit.

2 dwg