Hoping someone with a little more knowledge of these pistols out there can shed some light on my situation. I recently sold my STI DVC open pistol to a guy. I bought if new from a dealer about a year after they were first introduced. When this guy received the pistol, he said it wasn’t a “factory built” gun because it had a serial number prefix of TG and not TX. He said his buddy is an “STI expert” and stated the gun was just a parts gun as the TG serial numbers meant it was a frame sold to Tim Graves which he may have built or sold just the frame. I tried searching info on Tim Graves but seems he is no longer in business. Any info would be greatly appreciated.