I just found an awesome deal on a used 5906TSW that is in great condition however this 5906TSW is a bit different than others I have seen. As you can see in the pictures below there is an extended slide stop on it and there is a sizable area that has front cocking serrations. These changes look like performance center features but the pistol is not labeled as one from the performance center. Maybe it was a special order from the original owner? I have never seen a standard 5906 or 5906TSW like this one.