Guarder Steel Valve Knocker for Marui/KJ G Series GBB Series

Guarder Steel Valve Knocker for Marui/KJ G Series GBB Series Replace the standard valve knocker of airsoft pistol magazine Steel Construction Design for Tokyo Marui G17, G18C, G26 / KJ Works G23 / G27 Series Airsoft Gas Blow Back GBB Pistol As always, upgrading GBB require necessary skill & technique, consult expertise if needed