COWCOW Technology Steel 120% Recoil Spring for Marui Model 17 Gen 4 GBB

COWCOW Technology Steel 120% Recoil Spring for Marui Model 17 Gen 4 GBB Steel Construction 120% increased strength recoil spring increases the cycling performance of the pistol. Suitable for Tokyo Marui Model 17 Gen4 Series Airsoft Gas Blow Back GBB Pistol