I'm selling this for a friend that is not too gun savvy, but it's a 16" pre-ban upper with the triangular handguard, flash hider, A2 style with no b/bc. It does have the charging handle, though. Appears to be brand new- it still had grease in the bore when I got it and the only markings I have found were on top of the barrel: MB CL bore. I would think it's a Colt but can't say for sure. I'm asking $250. Can email pics. Thanks!