I am another Newbie thinking about doing the same thing, and I really appreciate this site and the members on it. It's nice to make a educated choice instead of a out right guess.
I got all my goodies set up for the sunset, except for another lower. No matter what happens, I will have an AR that is made for me, but it sure would be nice to have TWO AR's if you know what I mean. I ain't too crazy about swapping uppers all the time on one lower. Plus I read somewhere it was bad. (Excessive wearing etc.)
Like EVERYONE here knew, this AR thing is addictive, and as soon as I got my 1st, I just had to get another...you know, to make one with everything that ain't on the first, LOL!
I'm thinkin' Bushmaster for the lower. The extra upper is a Bushy, and when fit on the lower I have now it fits very snug, even better than the upper the gun came with. I can fit an accuwedge in the stock setup, but can't with the extra upper. NICE FIT.
Anyway thanks for posting this, I have learned alot!
E