Guarder Magazine Base Mount Screw for Marui Hi-Capa 5.1 GBB Series

Guarder Magazine Base Mount Screw for Marui Hi-Capa 5.1 GBB Series
Use together with the mag base for optimal desired effect and it can work with other bases as well
Suitable for Tokyo Marui Hi-Capa 5.1 Series Airsoft Gas Blow Back GBB Pistol Magazine