8mm Gearbox M4/M16 Gearbox Version 2 Includes: Bushings, Selector Plate Price: $65.00   8mm Gearbox MP5 Gearbox Version 2 Includes: Bushings, Selector Plate Price: $65.00   8mm Gearbox AK47 Gearbox Version 3 Includes: Bushings, Selector Plate Price: $65.00   8mm Gearbox G36 Gearbox Version 3 Includes: Bushings, Selector Plate Price: $65.00