I have the exact same gun. When I called because I had two shells explode near the base and blow the mag out the bottom, Wendy, at Special Weapons, told me that the receivers say Special Weapons but the guns were built by Special Weapons. I don't really have words for that. In the 10-15 rounds I put through my rifle I didn't have one successful cycle. The cocking tube is soft. Just hand cycling will cause a burr to develop in the notch that holds the bolt assembly back. I paid around $1,000 for mine 2 1/2 years ago. I wish I had done more research. For that same $1,000 you can buy a PTR PDW that will actually run.
If you want to sell it, do you have a receipt from Special Weapons? If so, I'd send it back to them. More than likely, they will just give you your money back and you'd be ahead of the game. If you don't have a receipt from Special Weapons, you'll get the same runaround I did. So put it up for sale on Gun Broker for $600-$700. You might catch someone like me that didn't do their homework. Jeff (ghilliebear2000) and I have talked about what it would take to make my gun run. The trunnion in a 33 has a ramp to help feed the rounds into the chamber. He thought that might help. The SW guns used a G3 trunnion. So new trunnion, PTR 7.62X39 PDW barrel and cocking tube will get my investment probably around twice what I'd pay for a new PTR PDW. YMMV.
Scott