Tokyo Marui Original Part for Hi-Capa 5.1 (No. H51-21)

Tokyo Marui Original Part for Hi-Capa 5.1 (No. H51-21) Metal Construction Design For Replace the Original Spring Suitable for Tokyo Marui Hi-Capa 5.1 Sereis Airsoft Gas Blow Back GBB Pistol As always, upgrading sniper rifle require necessary skill & technique to dissemble the gearbox, consult expertise if needed