CYMA Platinum Series Complete QD Version 3 V3 Gearbox with High Speed Motor For CYMA Platinum Series AK Alfa Series AEG Rifles AirsoftCYMA Platinum Series Complete QD Version 3 V3 Gearbox with High Speed Motor For CYMA Platinum Series AK Alfa Series AEG Rifles Airsoft Made out of reinforced metal. Complete Assembled Gearbox. On board electronic trigger. CNC aluminum cylinder and cylinder head. Full steel gears and piston teeth. 8mm bushing. Low resistance wire. High speed motor. 8mm gearbox shell with molded radiused cylinder window and reinforcement. Quick change spring system