Selling a proof 16” carbon .223 barrel. Full disclosure, it had a hard time grouping with a dedicated .223 suppressor. Bullets were very lightly grazing the end cap. 30 call suppressor and unsuppressed it seemed fine. I ended up swapping it for a JP. Threads and crown all look fine. Shouldn’t have more than a couple hundred rounds on it. Selling with a rifle speed gas block and mid length gas tubes. Gas block/tubes new/unused. $350 obo for everything.