COWCOW Technology Enhance Piston Head for Action Army AAP01 GBB Pistol

COWCOW Technology Enhance Piston Head for Action Army AAP01 GBB Pistol Rubber Construction Enhanced Piston Head for Air-Tightness Designed to offer a more robust piston head to stand prolonged use under the rigors of Green Gas Suitable For Action Army AAP01 Series Airsoft Gas Blow Back GBB Pistol Airsoft Guns