Originally Posted by bwiese
An RRA LAR15 lower with an M&A upper cannot not form any Rock River Arms banned (or otherwise) rifle, as long as features are properly configured to avoid SB23 configurations.
[Aside from legal matters, why you're buying an M&A upper puzzles me, however, as they're not high up on the list (LMT, Bushmaster, Armalite, Colt, etc.)]
Thanks for the reply.
I claim no personal knowledge of the M&A uppers (as I said I'm new to the whole game); my decision to purchase was based on several positive reviews I read about the M&A kits. Additionally numerous posts on AR15.com and other similar websites indicated that M&A uses LMT uppers and Wilson barrels for their kits. Apparently they ocassionaly use RRA uppers as well. Again this is not personal experience, but most of the people making the statements seemed to have personal experience and be fairly knowledgeable.
The most recent post I could find (without doing too much digging and just looking on AR15.com) was here: M&A Kits
A note on M&A's website in the FAQ also seems to indicate that they use LMT uppers. They state that they can't list specific lower receivers to recommend but that a list of lowers (including RRA) will match LMT uppers?? (Full FAQ here
Again, according to others, the RRA uppers that do go out from M&A are stamped as RRA (whereas the LMT aren't stamped but do have LMT markings), if I did receive an RRA upper, would my configuration then constitute worry based on this thread?