FIELD: weapons and ammunition.
SUBSTANCE: drive 100 of breech 3 displacing axially toward gun barrel 2 or its holder 5 equipped with motor 2 comprises crank 8 with slot 17 accommodating con-rod pin 9 with slider 10 and link cam 11 forced in control groove 15. Crank can continuously revolve about rotational axis M while link cam can enter breech holder slot 16 arranged across fire direction. Displacement set by guide groove in fire direction is transmitted via con-rod pin and holder or directly to the breech. Displacement across fire direction is caused by link cam displacement relative to holder slot.
EFFECT: drive operation at high rate of fire.
8 cl, 4 dwg
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