CYMA Platinum Series EFCS Version ECU High Torque Motor V2 Gearbox For M4 M16 AEG Rear Wire | AirsoftEra
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
CNC Gearbox V2 8mm with Spring Guide | Grey-shop
Retro Arms CNC Gearbox for V2 (8mm)
CYMA] Complete M4 V2 Gearbox Full Set W/ Motor[For Tokyo Marui M4 AEG – SIXmm (6mm)
Amazon.com : Airsoft Parts E&C 8mm Complete M4 M16 Series AEG V2 Gearbox Version 2 Rear Line : Sports & Outdoors