This is a complete upper including bolt and carrier. It has about 250 rounds through it, and slight wear on the rail. It was sold to me as having a Wilson barrel, but it's unmarked. Looking for $350 plus actual shipping cost (via UPS). Also, willing to work out a trade deal for a 16" mid-length upper or even the right m4 style one. Would consider trade for EOTech or similar as well. This upper is very accurate, but it is too heavy for my current passion - 3 gun matches. Please reply here or e-mail dan44756 at yahoo. Thanks for looking.