AUTOMATICS OF SMALL-ARMS WEAPON Russian patent published in 2015 - IPC F41A3/00 

FIELD: armaments and ammunition.

SUBSTANCE: automatics of small-arms weapon includes sleeve with screw-type or shaped shoulders, and combat shoulders of barrel breech, having screw-type or shaped and parallel facets. The sleeve is secured on the weapon frame, where barrel moves along its axis, rotating around it by screw-type or shaped slots in its breech. The combat shoulders of the barrel breech are in the screw-type or shaped slots of the casing-breechblock or in rectangular slots of the casing-breechblock during automatics operation.

EFFECT: improved reliability and simplifying of automatics design.

2 dwg