If you own either a H&K or a USP Umarex USA airsoft pistol, the Umarex USA H&K CO2 airsoft pistol magazine is the perfect addition for your gun. The magazine holds up to 16 rounds and is manufactured out of a quality metal.
Specifications and Features:
Fits: Umarex Heckler and Koch USP Co2 Airsoft Pistols
Exactly matched for HK guns