Guarder Steel STI Custom Type Rear Sight for Marui Hi-Capa 5.1 Airsoft GBB

Guarder Steel STI Custom Type Rear Sight for Marui Hi-Capa 5.1 Airsoft GBB Steel Construction STI Custom Style Iron Sight Design For Upgrade the Original Parts Suitable For Tokyo Marui Hi-Capa 5.1 Series Gas Blow Back GBB Pistol