I want to buy a complete upper or parts to complete an upper. I need the entire upper including bolt and charging handle. Must be Colt, Colt Gray in Color, A2 Fixed handle, A2 Flash and hand guards, With or without bayonet lug. I also want Colt A2 Buttstock. Basically I have a 6601 lower complete and need everything else. If you have a 6601 and want to turn it into an M4, I'd buy everything you don't want. E-mail offers. Prefer photos.