Heckler & Koch / Umarex CO2 Magazine for H&K USP Tactical GBB Pistols

Heckler & Koch / Umarex CO2 Magazine for H&K USP Tactical GBB Pistols Features High quality metal construction Heavy weight design to simulate the weight of a real loaded magazine High tension steel spring for reliable feeding 18 round capacity Compatibility: Umarex H&K USP Tactical CO2 Powered GBB Pistols Capacity: 18rds Gas Type: CO2 Manufacturer: Umarex 'Modification of Green Gas and CO2 magazines to use aftermarket HPA fittings and valves will void all included warranties due to the potential risk of damage from exposure to High pressure and misuse.'