I have a new old stock grey M16 upper, bare no sights or port cover. C in a square stamped on the side. Colt? Looks to never have been assembled, finish is not perfect though.
I also have a Bushmaster A2 upper, light use less than 300 rnds with the sight assembly, forward assist but no ejection port cover. Excellent used condition.
I'd like to trade one of the above for a new or like new A1 upper with forward assist and preferebly no deflector. Can be stripped or assembled.