Hey folks, I'm now the owner of a new 16" BM upper and had a chance to sight it in this past Saturday. I was able to get the rifle hitting 1" groups in only 6 shots. However I have issues with the gun not being able to pull a round off the mag and the rounds getting stuck in the mag. I'm going to search around this site for a bit to see if others have had the same issue before posting.
Looking forward to lots of good reading!