For sale precision firearms built 6mm arc upper. The upper has a match bolt and 24" bartlein barrel .850 diameter heavy barrel. It has a +1 length gas tube with a seekins adjustable gas block. This gun is a sub moa ar15 upper that will not dissappoint in accuracy. Less than 150 rounds down the tube just broke in asking $1350 I will also offer a package deal with 120 pieces of brass and 200 bullets and a set of dies for $1500