CYMA Completed Gearbox Set with High Torque Motor for AK AEG ( CM02B )

Metal bushing and ver.3 standard gears Aluminum cylinder Reinforced gearbox shell Compatible with standard Tokyo Marui spec version 3 gearbox parts and upgrades Complete drop-in gearbox solution for those who are looking for a powerful, durable yet economical complete full metal gearbox Non-quick-change spring construction!