GHK Version3 Knocker Set (#M4V3-KIT-02) for GHK M4 V2 GBB Airsoft Rifle

Key Feature Metal Construction Airsoft Knocker Set Design For Upgrade Your Airsoft Rifle Knocker Set From Version 2 to Version 3 (#M4V3-KIT-02) Included Metal Knocker & Hammer Spring Suitable For GHK M4 V2 Gas Blow Back GBB Airsoft Rifle Also Fit For GHK M4 V3 Gas Blow Back GBB Rifle Airsoft Gun