Brand : PH+ (Precision Engineering)

Material : CNC Machined Aviation Aluminum / High-Grade Fluororubber O-Ring

Compatible with : Tokyo Marui M4 MWS GBBR Series & Guns Modify EVO / MWS Nozzle Assemblies

Weight : Approx. 5g

Length : Direct OEM Drop-in Profile

System : Gas Blowback Rifle (GBBR) Internal Nozzle & Air Seal Components

This PH+ Piston Head for MWS system is a high-performance internal seal upgrade engineered specifically for the Tokyo Marui M4 MWS GBB platform. Machined from lightweight aluminum with tight tolerances, it replaces the factory rubber piston head to deliver a vastly superior air seal inside the loading nozzle. Equipped with an oil-resistant fluororubber O-ring, it maximizes gas efficiency, stabilizes muzzle velocity (FPS) consistency across rapid fire, and improves cold-weather cycling performance by reducing friction and preventing gas leakage during heavy bolt action