FG-Airsoft GHK M4 CNC Aluminium Hop Chamber.
- More durable
- Better barrel lock by pressure screws
- Better sealing
- Compatible with original barrel and rubber and AEG components
- Increased constancy, the arm is held pressed against the wheel by an O-ring
- Wheel and arm not included, uses originals components
- Compatible aluminum wheel available
M4 V1 WARNING : check that the smallest nick of the barrel extension measure 2.4 ~ 2.5 mm in width if not you will need a new barrel extension
Installation video here