Heavyweight 22-round magazine
Magazine also houses the CO2 cylinder
Ambidextrous magazine release
Integrated accessory rail
Realistic hammer movement
This H&K USP holds 22 rounds in a heavyweight magazine that also houses the CO2 cylinder that powers it. Features an ambidextrous magazine release, integrated accessory rail, and realistic hammer movement. This is a great practice pistol for 9mm USP owners. .177-caliber BBs.