Lonex 8mm Gearbox M4 series GB-00-01
Lonex 8mm Gearbox v2 series, included ball bearing 8mm, tappet plate, and selector plate
Classic army gearbox V3 7mm
Gear Box Version III for AK, G36, MP5 K, etc...
Classic Army cod.A063M REINFORCED
WITH 7mm BUSHINGS with bearings included