I built one using one the brownells faxon barrels. It was 18inch with mid length gas tube. What I know now I should’ve waited and bought a 20 inch barrel with rifle length gas tube better yet one with rifle +2 length. Mine was way over gassed ended up putting a gas block on it. One day it would shoot cloverleaf 5 shot groups. Next day same load shoot like chit. I tried leverevolution, varget, like is said shoot good one day horrible the next. I chit canned it sold the upper to a buddy with bolt for $100 bucks I told him the issues he didn’t care. When it would shoot it shot 95gr Berger VLD’s very well. I keep hoping Ben at Bison Armory will start chambering the 6 ARC soon as he does I will get back in the AR15 6 ARC game. I do have a savage 110 switchback in one I shot couple times as stated the magazine on them suck bad.
