I have a used Colt marked A1 upper(triangle and square proofs) w/ a C MP marked barrel, and A1 flash hider. Currently has a set of A2 hg's but I'll include the A1 set, which has a cracked tooth I think. $400
Also, a used Colt "C" marked BC and MPC marked bolt, FA BCG $200 if the buyer of the upper does not want(will not sell unless the upper goes first.
It is shown here complete on a lower which is over in the complete gun section.
Lower is gone, now will sell complete upper only for $510 shipped!! SPF