Complete Upper Gear Box for ICS M4 M16 Series Airsoft AEG (330~370 FPS)
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.
Features / Application:
- Swap a worn gearbox out of the gun and replace in seconds!