PDI Piston Head (Winter) for Marui Hi-Capa 5.1/ 4.3/ 1911 GBB

PDI Piston Head (Winter) for Marui Hi-Capa 5.1/ 4.3/ 1911 GBB Design For better seal and blowback kick in cold weather Suitable For Tokyo Marui Hi-Capa 5.1/ 4.3/ 1911 Series Airsoft Gas Blow Back GBB Pistol Airsoft Guns