Complete Gearboxes & Shells

Army Force GenII Next Gen AEG Gearbox Shell (8mm) This Metal Army Force Gearbox Shell for TM Next..

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 ..

CYMA M4 Complete Gearbox V.2 (Rear Wired) This CYMA V2 M4 Full Gearbox comes complete with a Mot..

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

Retro-Arms CNC Gearbox V3 (8mm Bearings), Quick Spring Change & Speed Trigger A CNC Machined..