Prometheus Piston Head POM New Ver.2
- This Prometheus piston Head (POM) is the perfect upgrade part for the M4/HK416/HK417 Next Generation Recoil Shock Series from Marui.
- This is a high quality POM piston head from Layax, there aren't many manufacturers making a specific piston head for M4 Next Generation recoil shocks making this a very popular piston head.
- High Flow Air Holes For Increased Airseal.
- Bearing to reduce spring tension.