FPS reducing valve for KWC Airsoft CO2 blowback p08 Luger

Replacement for part for the KWC P08 Luger CO2 airsoft pistol, this replaces part "P08" on the blueprint, it reduced my pistols FPS from a slightly spicy 390FPS to a more UK game-legal 300-280FPS. be warned installation is fiddly, you'll need long nose tweezers to re-install spring S11