HK USP Co2 Non Blowback Airsoft Pistol DEBThe HK USP CO2 in Dark Brown Earth features a 16 round metal magazine that also houses the 12g CO2 gas cartridge. Experience the quality and performance that shooters have come to expect from the world class Heckler & Koch firearms manufacturer. We made this licensed HK USP CO2 airsoft pistol to perform well while being budget friendly. The fixed slide means less wear and tear on the internals and more time shooting. Just in case, the HK USP CO2 fixed