I would like to have a 9mm AR. The RRA 9mm pistol with the 10.5" barrel is what I been thinking about however now with the Norc M4 on the market maybe the norc and a 9mm upper and have the best of both worlds? I am not up to date on the AR`s and would like some input. I know the RRA pistols and also 9mm uppers are hard to get at the moment however just wondering what would be better to have a pistol and get 223 upper or get norc and find 9mm upper? anyone tried a 9mm upper on the norc? any disadvantage to having RRA pistol and getting rifle upper? or vice versa..
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