Have you tried engaging the Postal Inspectors? Since you say the transaction involved shipping by USPS this might be in their jurisdiction.
At what (very well documented) point do you report the gun as stolen? Since you don't have it and the gunsmith says he does't have it then either the gunsmith stole nit or it was stolen by someone at UPS before it was scanned in.
Last edited by GunReader; 12/18/17.
