ATI Xtreme Machining ATI-15, chambered in 5.56 has a 1 in 7 twist heavy barrel. Has mid length quad rail. Has an ADCO red/green 5 power optic. Has a six position Roger’s Super Stock with quick disconnect sling port. This gun has an aluminum receiver. In great condition. Winner of the bid can call (252)777-4293 and pay by credit card.