The Umarex HK USP is a 4.5mm BB pistol that holds 22-rounds in a heavyweight magazine that also houses the CO2 cylinder that powers this BB pistol. It has an ambidextrous magazine release, integrated accessory rail and realistic hammer movement. This is a great practice pistol for 9mm USP owners. For just pennies a shot you can shoot for hours. It features a durable polymer construction with officially licensed Heckler and Koch trademarks.

Compatible magazine: UMX2252301