CowCow Hop-Up Bucking Combo GBB 3pc

High quality anti-oil rubber material
3 different hardness (50°White/60°Red/70°Black)
Re-designed entrance shape for better air seal with nozzle
Flared chamber shape for better BB feeding
Effectively extend the shooting range by enhancing the spin velocity
Fits TM Hi-CAPA/1911, G-series, M&P, MWS