Compatibility: H&K USP Tactical Full Size (Not for H&K USP Compact) by KWC Only
Velocity: 380 FPS / 1.34 Joules (Measured with 0.20g BBs and 12g Co2 Cartridge)
System: Gas Blowback
Capacity: 18 rounds
Gas Type: Co2
The Umarex H&K USP Co2 18rd spare airsoft magazine by KWC is made from heavyweight aluminum, giving a hefty feel to the USP airsoft pistol. This green gas Umarex magazine has a high-efficiency internal gas system providing excellent FPS output, and reinforced valves and seals for optimal gas retention. We recommend using Valken 12g Co2 Cartridges with this gas pistol magazine.