Tokyo Marui M4A1 Barrel Nut For Carbine (ZET System) GBB (# MGG2-10)

Tokyo Marui M4A1 Barrel Nut For Carbine (ZET System) GBB (# MGG2-10) Metal Construction Design For Replace the Origianl Parts (# MGG2-10) Suitable for M4A1 Series Airsoft Gas Blow Back GBB Rifle