FIELD: weapons and ammunition.
SUBSTANCE: invention relates to small arms. Proposed gun comprises breech mechanism 20 and breech box 12 with, at least, one opening 13. Breech mechanism comprises bolt 21, breech frame 22 with trigger lever 24 and inertial return element 23. Closing device 30 comprises cover 31 to displace in lengthwise guide 32 from front position whereat it interacts with lateral opening 13 into rear position of no interaction therewith. Inertial mechanism 23 comprises two springs 23a and 23b arranged one after another on said guide 32. Supports 33 of cover 31 are arranged axially to slide in guide 32 between first spring 23a and second spring 23b.
EFFECT: reliable operation.
8 cl, 4 dwg
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