Umarex Heckler & Koch USP CO2 Air Pistol .177 Caliber BlackSpecifications: Brand: H&K Umarex Propellant: CO2 Cartridge Caliber: . 177 Steel BBs Muzzle Velocity: 400 fps Magazine Capacity: 22 rounds Firing Modes: Semi Safe Color: Black Features: Mags hold 22 rounds in a heavyweight magazine that also houses the CO2 cartridge that powers the pistol Has an ambidextrous magazine release, integrated accessory rail, and a realistic hammer movement Shoots accurately and is great fun for plinking and target shooting