AUTOMATIC SMALL-ARMS Russian patent published in 1994 - IPC

FIELD: automatic small-arms. SUBSTANCE: mechanism has insert 3 of barrel box 1, the insert has cuts 5. The mechanism also has lock frame 10 and lock 11 with one locking lug 18. Ramming lug 20 is used as the second locking lug. For locking lock 11 rotates to the left around the longitudinal axis, its locking lugs enter cuts 5 of insert 1. The height of insert 3 is below the level of folds 2 of the barrel box 1. Locking frame 10 may have a longitudinal side cut, and cover 6 of barrel box 1 may have fold 8 through the full length. EFFECT: reduced mass and facilitated manufacture. 3 cl, 13 dwg