Firearms with external motor

Automatic weapon which comprises a barrel which is stationary with respect to a breech casing, a cartridge chamber which is limited at the rear of the barrel by a movable breech mechanism, said breech mechanism having a follower for imparting an alternating movement of translation to said breech mechanism which assures the opening and closing of the cartridge chamber, characterized by the fact said automatic weapon has at least one bolt connected to said breech casing by elastic means, said bolt being urged in the direction of said breech mechanism and having a locking portion locking the breech mechanism in advanced position with respect to the breech casing;

• an electrical motor coupled to a drum, said drum having a ramp for actuating said follower;
• mechanical means sensitive to the position of the breech mechanism with respect to the breech casing and capable of maintaining the bolt out of locking as long as the breech mechanism does not occupy an advanced position with respect to the breech casing;
• means sensitive to "shot departure" information and adapted momentarily to keep the bolt from locking at the start of the recoil stroke of the breech mechanism and to lock said bolt with said breech mechanism, depending on whether said means receive such information or not;
• and a feed circuit for supplying an operating current to the external motor, a fire trigger switch adapted to control said operating current, and means for inhibiting said operating current when said means sensitive to said information indicates no "shot departure" information has been received.