CYMA] Complete M4 V2 Gearbox Full Set W/ Motor[For Tokyo Marui M4 AEG – SIXmm (6mm)
EG Hard Gearbox Shell Prometheus V2 8 mm
EMG Platinum Complete Version 2 Gearbox w/ Motor for M4/M16 Airsoft AEG (Model: Rear Wired), Accessories & Parts, AEG Internal Parts, Gearbox, Version 2 Gearboxes - Evike.com Airsoft Superstore