A main feature of an ICS M4 is it's two piece gearbox. The upper gearbox can be slided out and replaced in the middle of battler within a minute or two. Having an extra gearbox for an ICS M4 is equivalent to having a spare gun when you needed a spare.Swap a worn gearbox out of the gun and replace in seconds!
Features / Application:
Complete tune up kit includes:
-ICS M4 Metal Upper Gearbox with screws
-ICS Version 2 reinforced nozzle
-ICS MC-02 Tappet plate for ICS M4