Airsoft Masterpiece Aluminum Magazine Base (STI Style) for Marui Hi-Capa 5.1 GBB Power-(fps)_285 FPS and you are not able

and you are not able or willing to add it

- Reinforced Gas Blow Back System

SYSTEMA releases a 2 piece structured cylinder head

G&P 1500rds Attack Type Auto Winding Drum Magazine for Marui M16 Series (Black)

Airsoft Masterpiece Aluminum Magazine Base (STI Style) for Marui Hi-Capa 5.1 GBB Power-(fps)_285 FPS and you are not ableAirsoft Masterpiece Aluminum Magazine Base (STI Style) for Marui Hi Capa 5. 1 GBB Aluminum Construction These magazine base adds to the aesthetics of the pistol and also provides protection from dropping your magazine Suitable for Tokyo Marui Hi Capa 5. 1 Series Airsoft Gas Blow Back GBB Pistol