I thought that the m16 carrier didnt work with the rLL. See this link from quarterbore:
http://www.quarterbore.com/nfa/lightninglink.html
I have a Colt LE6921 SBR that came with an M16 BCG, and I was under the impression that the rLL wouldnt work with my M16 bolt carrier, so I was shopping around for another one. But if the M16 carrier will work, then obviously I dont want to get another one. So will the M16 carrier work or not?