A cartridge spacer ring carrying interior separators is fastened by a rivet to the magazine pan. Inside the pan itself is the magazine center; while outside is the magazine top plate, enclosing the magazine latch and the magazine latch spring. The magazine center and the top plate are fastened together by rivets. The wall of the magazine pan has corrugations where from the outside serve to engage with the stop pawl and the rebound pawl to permit feeding and hold the magazine in place. Inside the pan these corrugation provide spaces in which the bases of the cartridges rest. The magazine center is hollow and provided with a keyway which fits over the magazine port on top of the receiver. Holds 47 cartridges.