I have recently been bitten by the AR bug. I allready have the 1911 bug so its getting pretty bad around here. I have put together a AR in 5.56 and yes I sometimes feel the urge to stick a bunch of useless crap on it but have resisted so far. So now I feel the need for another AR and had a few questions for you AR gurus. I'm piecing together a 9mm AR and so far I have the 9mm BCG, barrel, magblocks, PSA lower, and mags. I know I still need a 9mm hammer and a heavier buffer but what other parts wont work off a .223? Boltstop? I have heard bolthways yes and no. And I'm planning on using a Fwd assist plug so thats not an issue. Thanks in advance.