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
A&K Complete Metal Gearbox for SR25 Series Airsoft AEGs -ModernAirsoft
High Speed Reinforced M5K Drop In Gearbox – Lock N Load Airsoft
Echo 1 M4 8mm Complete Gearbox ( Rear Wired )
JG M4 M130 Complete AEG Gearbox ( Rear Wired )
Complete gearbox with Perun Optical Mosfet [Arcturus] | TaiwanGun US & EU
Echo1 Complete 8mm Metal Gearbox for M4 / M16 Series Airsoft AEG Rifles (Wiring: Rear), Accessories & Parts, AEG Internal Parts, Gearbox, Version 2 Gearboxes - Evike.com Airsoft Superstore
Partial Airsoft V2 gearbox | 3D CAD Model Library | GrabCAD