Prometheus Piston Head for v2 Next Gen Recoil M4 etc

This is a high quality upgrade part, by Prometheus, for the Next Generation Recoil system. It is made to fit the M4 Sopmod / HK 416 / HK 417 etc.

This piston head is built using resilient and reliable POM material which has excellent fatigue resistance and abrasion resistance friction characteristics. It also offers self-lubricating performance, in head shape which enhances operation at the time of air supply, fuel consumption efficiency, and airtightness at the time of compression, exhaust efficiency and durability.

Moreover, by equipping the thrust bearing Prometheus have eliminate the yore at spring compression to maximize the performance.