Abstract: A removable cartridge magazine for firearms adapted to engage the firing chamber of a firearm comprising an elongated housing, a first gear rotatably mounted in one end of the housing adjacent the portion of the housing that engages the firing chamber of the firearm, a second gear mounted at the other end of the housing, an endless belt encircling the gears and engagable therewith whereby rotation of said gears rotates said belt, the belt being spaced inwardly from the inner wall of the housing, a plurality of spaced shell receiving compartments mounted along the outer periphery of said belt adjacent the inner wall of the housing, each compartment being an elongated groove extending longitudinally across the outer surface of the belt adjacent the inner wall of the housing in a direction traverse to the direction of movement of the belt.