VFC GBBR Inject Valve for Umarex MP5 GBB Series

VFC GBBR Inject Valve for Umarex MP5 GBB Series Metal Construction Design For Repalce The Original Inlet Valve of airsoft magazine Suitable For Umarex MP5 Series Airsoft Gas Blow Back GBB Rifle As always, upgrading GBB require necessary skill & technique, consult expertise if needed