Specifications and Features: – Product Group: Air Rifles – Brand: Umarex – Velocity (FPS): 430 – Caliber: 0.177 (4.5mm) – Ammo Type: Steel BBs – FPS w/Lead Pellet: 430 – Barrel Length: 7.5 – Total Length (inches): 15 – Capacity: 300 – Optic Compatible: Tactical Rail – Action: Semi & Full Auto – Safety Type: Automatic – Power: CO2 – 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 in your hands with its ultra-accurate look and feel. The gun is powered by dual 12 g CO2 capsules and the CO2 is housed in a drop out magazine for ease of access.