Colt 723 Upper With No Markings?
Hi all, back with another obscure and niche question. I’ve come across a Colt 723 upper that’s I am looking to grab but a little confused as there are no C and forge marks on it. Where the Colt C and forge mark would typically be is just blank. The seller is reputable and claims that it is a Colt police trade in, but I’m skeptical because I can’t find any definitive answers on if Colt ever produced a C7/723 upper without markings. Any info out there on this?