Systema Ambidextrouse Gear Box Kit for PTW M4-A1 / CQBR

Systema Ambidextrouse Gear Box Kit for PTW M4-A1 / CQBR Metal Construction Suitable For Systema PTW M4A1/ CQB Rifle Include Gearbox, Motor, Data Cable, Contact PCB & Mosfet PCB. (for M165 Cylinder)