- Highlighted features
- Enhanced Piston Head for Air-Tightness.
- Designed to withstand high impact pressure.
- Stabilized Performance.
- Improved durability over TM piston head
- High quality anti-oil rubber material
- Suitable for Action Army AAP01 GBB

**Important Notice**
It may has a condition that your pistol cannot feed the BB bullet due to lightweight gas supply. You just simple remove a spacer to solve the issue. Alternatively, you may consult your gunsmith for advancing fitting to solve this issue as well.
 
Increasing in FPS can be achieved; however, it may require other parts to collaborate and advanced skill is needed. improper installation / fitting can shorten the life of the product.