BB gun fans can rejoice, the Steel Storm has arrived! The Umarex Steel Storm Tactical BB gun has a 30 shot capacity, with a 300-round reserve! It allows you to shoot 6-shot bursts in "full-auto" mode, and single shots in semi-auto mode. The gun gives the feel of a real gun with real blowback action. The gun is powered by dual 12 g CO2 capsules, and the CO2 is housed in a drop out magazine for ease of access. And if you want having to skip using 12g CO2 and would rather use a bulk CO2 tank, pick up the Air Venturi Steel Storm CO2 Bulk-Fill Adapter!