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5 Posts
ive seen some people are getting the new MR223A1's with a build code of BB and they are now interchangable uppers with other AR15's..
as shown in this video
20120309231850.wmv - YouTube
what other changes do the A1's have? any links to info?
i assume a HK416 upper would now fit directly on the MR233A1 lower?
as shown in this video
20120309231850.wmv - YouTube
what other changes do the A1's have? any links to info?
i assume a HK416 upper would now fit directly on the MR233A1 lower?