Actually, I just found it humorous that you said "All Colt, except" and then provided to list the only parts that most would care about being made by Colt (barrel, lower receiver). Not discounting the weapon, it's nice. Just kinda funny to say "All Colt" and then except the more important Colt parts. Kinda like saying, "All Ferrari" except the Motor, Suspension, and a few other small parts. For instance, when I post pics of my DD rifle, I don't say, "All DD." I simply post a pic of the nice rifle. Carry on, though and enjoy your Colt parts. Like I said, nice rifle!
http://i854.photobucket.com/albums/ab104/ASH556/IMG_2011.jpg