i purchased a frankinstein ar15 a few months ago for a very generous price. what i have is a traditional colt upper 20inch heavy barrel, it has a fixed carry handle, traditional triangle (vietnam) foregrip. im also told its a left handed style upper... because of the triangle protrusion just behind the ejection port, also told that there isnt a bayonet lug, and that it must have been modified. it was sold with a bushmaster carbonfiber lower. the combo is akward (beefy upper with a lightwieght lower). what id like to know is what the value for that upper. its in kind of rough shape (chipped paint)
i will post picture tomorrow if that of any help. is this something i should hold onto or just trade for a carbon fiber upper. are these disrable/ rare?