I am converting my 6.8 back into 5.56, so will have a bison armory barrel, a 6.8 bolt, and a bunch of mags for sale if you are interested. Might also consider selling the complete upper as well.
I’ve got a 6.8 SPC II that I built. WMD nickel boron upper and lower. Wilson 16” stainless fluted barrel. Wilson nickel boron bolt carrier group. Giessele 2 stage trigger - 2 pound first stage 1 pound break. Fortis 12” m lock hand guard. VLTOR adjustable butt stock. Magpul pistol grip. 10 magazines. I can’t remember the brand of themuzzle break, but it’s a good one. Topped with an eotech exps 3-2. I guess I’ve got 20 rounds through the barrel and it’s a tack driver. My father in law killed a 350 pound boar hog DRT with it from 100 yards. Can throw in all the ammo I have for it. I think I’ve got 8 boxes of Hornady 120 grain ammo, but I’d have to check to be sure. Let me know if you have any interest.