Professional Tune-up Kits- M150
Complete upgrade set for M4 AEG. Package contains:
- Stainless steel cylinder with a ribbed surface for better cooling.
- Aluminum piston head with the bearing.
- CNC aluminum cylinder head with double sealing and the rubber pad
- Aluminum nozzle with O-ring.
- CNC high torque gears 18:1
- Spring M150
- Metal spring guide with bearing