Hey Bat21. I purchased a bushmaster M-4 upper barrel kit complete for $180.00 then bought the DPMS lower for $125.00. The rest of the weapon is colt parts bought from R-guns. I dont think they have any more pre-ban lowers though. But anyway for the money mine shoots better than my wifes pre-ban A2 heavy barrel Colt. If I can help let me know I can get you the names of the places that I bought everything from.