MAG Replacement Springs for Tokyo Marui FN 5-7 GBB

MAG Replacement Springs for Tokyo Marui FN 5-7 GBB Metal Construction Airsoft Spring Design For Replace the Original Parts Suitable For Tokyo Marui FN 5-7 Gas Blow Back GBB Airsoft Pistol Package Include: FN-7 (x2)/ FN-9/ FN-12/ FN-20/ FN-21/ FN-37/ FN-40/ FN-43/ FN-45/ FN-65/ FN-68