SHS Ball Bearings Piston Head for Marui Next Gen Recoil Engine M4 gearbox (New Ver 2)
Polycarbonate Piston Head with Thrust Bearing is renewed to be more effective
Custom 6 holes ventilation design increase the stability during full auto shooting mode
It creates soft & quieter shooting sound than the sister part, Aluminum Version
Reinforced piston head will provide extra duration during rapid & prolonged firing
Recommended to use along with Upgrade Springs
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