Caliber (inch/mm): cal. 177/4,5 mm Magazine capacity: 22 Source of power: CO2 Weight: 2.3lbs Length: 8 7/8" Power in Joule: <3 Average velocity: 394 Fps / 120 m/s Body material: Metal Slide material: Metal Ammo: Steel BB .177 / 4.5 mm System: Blowback