Guarder Polycarbonate Ventilation Piston Head with Bearing Category_Full Tune-Up Kit Head resistant O-Ring

Head resistant O-Ring

HOP UP is equipped and located inside the ejector port cover

consult expertise if needed

Aluminum Receiver

you can always find this shotgun in SWAT Platoon

Guarder Polycarbonate Ventilation Piston Head with Bearing Category_Full Tune-Up Kit Head resistant O-RingGuarder Airsoft AEG Upgrade Part Series Polycarbonate Piston Head with Ball Bearing Essential part for upgrading your Airsoft AEG Polycarbonate Piston Head with Thrust Bearing is renewed to be more effective Custom 8 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