Magazine and feed mechanism for firearms

In a magazine and feed mechanism for a firearm having a receiver, a magazine mounted thereon and adapted to hold a plurality of cartridges arranged to be fed from the magazine in successively following order, a transfer disc rotatably mounted in the receiver and having a slot receiving the cartridge that is leading in the sense of the order in which the cartridges are fed from the magazine, in a position in which the leading cartridge initially extends transversely of the barrel and thereafter is alignable longitudinally therewith on rotatable movement of the disc, and a transfer disc actuating arm slidably movable in the receiver between a retracted position in which the disc receives the transversely disposed lead cartridge and an advanced position in which the arm rotates the disc to align the cartridge with the barrel, the improvement comprising:

• (a) gate means movably mounted on the magazine and normally engaging the leading cartridge against passage from the magazine into the cartridge slot of the transfer disc;
• (b) cartridge injector means movable between a normally retracted position outside the magazine and an advanced position in which it passes the gate means to enter the magazine, engage the lead cartridge, and force the cartridge past the gate into the cartridge slot of the transfer disc;
• and
• (c) means on the transfer disc actuating arm for relating the movement of the injector means to the movement of the actuating arm, whereby the injector means will shift to its advanced position when the actuating arm is retracted, and to its retracted position when the actuating arm is advanced.