Modify M4 AEG Completed Upgrade Gearbox Set /Rear Wire
For M4-A1/ RIS/ SR16 Airsoft(Speed Type /S100+, 8mm)
Modify Completed Gear box is use with Modify TORUS Gearbox, It has 3 holes. The openings are designed for inspection and tuning purposes. With them, you can check and lubricate directly the piston and gears without having to open it up. Not only the gear box but it is also installed with Modify-Tech enhance AEGs Internal Parts.
Modify Completed Gear Box is installed by the skill worker. It is comes with high quality and technique.