Exactly 180 rounds, 6 magazines through it, period. Also I'll send the gas tube too. As you see I also have a DD flash suppressor on it. We can deal on that or you dont have to take it and will mount several different suppressors KAC Gemtech and a few others I think.
It's currently attached to the billet slick side upper in the pics. If you want the whole thing let's talk. The upper is really nice too, like new with the same amount of use.
Otherwise its $250 + shipping in lower 48 for the barrel, gasblock and tube.