Complete Gearboxes & Shells

ASG ULTIMATE Ver.II M4 AEG Complete Gearbox, High Speed (M100 Spring) A complete 2nd Generation ..

ASG ULTIMATE Ver.II MP5 AEG Complete Gearbox, High Speed (M100 Spring) A complete 2nd Generation..

Boyi 7mm Bearing Gearbox Shell V.2 This gearbox shell from Boyi is ready to accept 7mm bearings ..

Guarder Enhanced Gearbox Shell Ver.3 (Marui Compatable) This Guarder Geabox Shell Will provide a..

Lonex Ver.III AK AEG Complete Gearbox, High Speed (SP100 Spring) A complete 3nd Generation Versio..

Retro-Arms CNC Gearbox V2 (8mm Bearings), Quick Spring Change & Speed Trigger A CNC Machined..