Looking for a used but very good/excellent condition M16A1 (Colt 603) upper receiver. (Just the upper receiver, no barrel assembly.) Small hole mil-spec receiver with forward assist (not a large-hole SP1 upper).
Specifically, looking for one marked "C H" in the carry handle, under the rear sight wheel. Also open to "C K" and "C M."
Condition & color of the finish are unimportant, as I will likely send it to US Anodizing to be stripped & refinished, but it must be free of heavy dings, dents & gouges. There should also be no non-factory engravings/stampings present (example: no rack number stamped into the back of the carry handle, please).
In terms of parts, it can be totally stripped (no rear sight, no sight wheel, no tear-drop forward assist, no port door) if necessary, but will gladly accept one that does include those parts.