SHS Polycarbonate 15 Teeth Piston for Systema / A&K M4 / M16 PTW Series

SHS Polycarbonate 15 Teeth Piston for Systema / A&K M4 / M16 PTW Series Polymer Construction 15 Steel Teeth Suitable For Systema/ A&K M4/ M16 PTW Series Airsoft Rifle Suitable for mainstream high-speed tune-up and has excellent operational characteristics The Grease grooves cut on the rail-guides keep it lubricated Reinforced piston provide extra duration during rapid & prolonged firing