Used upper that I put together about a year ago that just doesn't get shot and I am funding another suppressor. Bcm thermal fit upper receiver with Brownells Wrenchman lw handguard (Midwest industries) and proof 18" stainless barrel. I purchased the barrel off someone who had it cerakoted but I had it blasted matte also the barrel was dimpled for gas block screws deeper than normal and best I can measure it the holes are .0565" deep. 550.00 shipped