Eagle6 Airsoft - M140 Spring For Next Generation Recoil Shock Series
- M140, This will give around 440 FPS.
- Made with high quality steel
- Heat Treated
- Measured every 10 springs
- Linear Spring For Increased Consistency
- Designed specifically for the Next Gen Recoil Shock AEG Range
Eagle6 NGRS M140 Upgrade Main Spring
This spring is very strong and requires a full Prometheus piston assembly.
Use with any other brand of piston is not recommended.