Bow Master CNC Aluminum Enhanced Adjustable Ventilation Piston Set For Umarex (VFC) MP5 V2 GBB Airso

Key Feature CNC Aluminum Construction Airsoft Enhanced Adjustable Ventilation Piston Set (Anodized Coating) Design For Upgrade the Original Airsoft Internal Parts Smoother blowback operation Increased gas efficiency Suitable For Umarex (VFC) MP5 V2 Gas Blow Back GBB Airsoft SMG Sub Machine Gun