AIRSOFT G&G ARP 556/9 Buffer Tube extender

This adapter will make the buffer tube of the factory G&G ARP 556/9 stock longer for use with larger batteries in airsoft use.  While I did create the CAD model, I reverse engineered this from a commercial design. Functions exactly the same. I suggest PA12-CF for this application if printed on FDM.  This part has no function on a real firearm and is designed specifically for use in AIRSOFT.