Description Features Durable metal construction Standard version 2 gearbox design Ball bearing bushings Factory direct OEM replacement part
Quick view Add to Cart Double Bell DOUBLE BELL Complete 8mm Ver. 2 Gearbox for M4/M16 Series Airsoft AEG - Rear Wired $68.44
Quick view Add to Cart Retro Arms Retro Arms CZ Billet CNC 8mm Ver.2 Gearbox Shell for M4 M16 Series Airsoft AEG Rifles - Black $136.89
Quick view Add to Cart Echo1 Echo1 Complete 8mm Metal Gearbox Shell for M4 / M16 Series Airsoft AEG Rifles $35.32
Quick view Add to Cart Retro Arms Retro Arms CZ Billet CNC 8mm Ver.2 Gearbox Shell for M4 / M16 Series Airsoft AEG Rifles (Color: Silver) $147.19
Quick view Add to Cart Retro Arms Retro Arms CZ Billet CNC 8mm Ver.2 Gearbox Shell for E&L M4 / M16 Series Airsoft AEG Rifles $142.78
Quick view Add to Cart Retro Arms Retro Arms CZ Billet CNC 9mm QSC Ver.2 Gearbox Shell for M4 M16 Series Airsoft AEG Rifles - Black $142.04