I have a Bushmaster Dissapator upper (H-bar, 1/9) with A2 sites and a Colt upper with A1 sites. The Colt barrel is not stamped, so I am not sure on the twist. They are both in really good condition and don't appear to have many rounds through them. I have a complete bolt carrier assembly and one set of handguards. They are both pre-ban, but since the FHs are not pinned, they could be made post-ban with ease (pin or remove FHs). The stock comes with the spring and buffer (has trap door). I am open to trades on just about anything, so make me some offers. I am especially looking for Glocks, Sigs, HKs, and tactical stuff. I have pictures if you are interested in seeing them.