| 摘要 |
A cylindrical rotor having a continuous spiral cam slot formed in its periphery reciprocates a breech block to drive rounds of ammunition into a barrel, to fire the round and to extract the expended cartridges after firing. A cam on the front end of the rotor controls movement of a lock which temporarily locks the breech block during the firing operation. Ejector pins on the rotor thrust an ejected cartridge sideways as the breech block is being reciprocated rearwardly. A cam on the rear of the rotor controls the feeding ammunition into the path of the breech block.
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