Valken Tactical M84 CO2 Semi Metal BB Pistol, 4.5 mm Robust fixed slide design, functioning safety Polymer/metal fixed slide pistol, weight: 731g Power: Co2 12g power let Muzzle Velocity: 110-130 mps (360-420 FPS), energy: 2.34 joules w/5.1 grain steel BB Magazine: 20 round metal "stick type" magazine