A really serious question here before you flame I do own and use guns almost daily 7 months a year. I might even carry the other 5.
Question why do you want an AR?
Don't give me flip answers and don't incriminate yourself NSA is watching beyond a doubt.
If I were target shooting I like the most accurate I can get. MOA works just fine for me.
If I am sport hunting I want a 1 shot kill.
I am seriously trying to find out the motivation.