CYMA Sport Complete Ver II Gearbox w/ Quick Change Spring for M4 Series Airsoft AEG

Features Wired to the rear 8mm metal bushings Quick change metal spring guide Reinforced gearbox shell Low resistance wiring Compatible w/ standard Tokyo Marui spec version 2 gearbox parts and upgrades Factory direct OEM replacement part On-board electronic trigger Manufacturer: CYMA Specifications: Spring: M120 (350~400 FPS)Connector Type: Deans ConnectorCompatibility: Most Version 2 Airsoft AEGsMaterial: Metal alloy, Low resistance wiring