ACTION Cylinder Head for Version 3 Gearbox
- An essential part for upgrading your AEG.
- A bumper-rubber is installed in the cylinder head to make each shot completely smooth and lock-free.
- Keeps the air nozzle stroke exactly at the center of the cylinder & stabilises the loading system.
- Constructed of milled aluminium.
- Suitable for all version 3 gearboxes.
- Includes a spare O-ring.