**Update**
I took it back to the SilencerCo dealer and went over it with him. We tried multiple end caps, mounts and such and ultimately he agreed with me that something is definitely not in alignment with the threaded portion at the endcap side of the silencer. He took some pictures with the bore alignment tool and promptly emailed SilencerCo support, the sales rep that he deals with, and myself and said he'll do everything he can to get it pushed through for a fast repair and back to me. And he sold me a few accessories that I wanted to go on the suppressor at his cost which saved me a good amount of money.