GHK AUG Output Valve For GHK AUG GBB Rifle (AUG-M-05)

GHK AUG Output Valve For GHK AUG GBB Rifle (AUG-M-05) Replace the standard Output Valve of airsoft magazine (Part No# AUG-M-05) Suitable For GHK AUG Gas Blow Back GBB Rifle Magazine As always, upgrading GBB require necessary skill & technique to dissemble the gun, consult expertise if needed