I've built many AR's in the past but all of them have been with 556 uppers. After much reading and watching of videos, I knew my next build would have to be a 300 Blackout!
Here she is. 8.2" Noveske barrel and with a Wilson Combat Accu-Tac flash hider.
Can't wait to go out and shoot it! Need to load up some rounds first though.
I like the way this one has turned out.
300-BLK-Pistol-1 by
Colorado CJ, on Flickr
300-BLK-Pistol-2 by
Colorado CJ, on Flickr