I just got my new Phantom flash hider in the mail from CSS. Now I'm not sure how to proceed with the barrel threading. The thread depth on the Phantom is 9/16 of an inch. The depth to the stopping point or wall is 11/16 of an inch. Do I need to cut my fsb back enough for the barrel to screw completely to the inside of the phantom, or do I just need to go the depth of the threads and index it where it needs to line up on the outside? It seems like to me that it would need to flush fit to the full 11/16 of an inch. But, that would cause problems when indexing it, right? Does it matter if