It comes with a 5-round detachable loading magazine that inserts from underneath the firing chamber. For polychrome pots, air is allowed to circulate inside the firing chamber. The Ion's receiver consists of a breech and firing chamber, both hard-anodized. The firing chamber in this design is part of the receiver proper. On another occasion, a torpedo, half stuck in the firing chamber required re-firing. The cartridge case seals a firing chamber in all directions excepting the bore. The firing chamber consists of a sand bed with a back wall of bricks.