For all intents and purposes, it’s done, save for having the lower receiver anodized. It’s built from one of the nicer Colt parts kits that were available some years ago. I had the lower receiver engraved with late export Colt 613 markings (my favorite, and very likely how the original rifle was marked), then re-profiled to M16A1 specs before milling it out. It has a newer 6920 semi-auto FCG and original Colt M16A1 lower parts, save for the little springs and detents. The barrel is a 1/7 C MP B (controversy over whether those are Colt or not), and an original Colt M16A1 BCG. I had a few options with handguards that I have on hand (an NOS Colt set, an NOS USGI set still in plastic, and a couple of Taiwanese sets), and I chose to use a newer Taiwanese set with an original Type E stock. The handguards feel and look great. When I find a suitable anodizer, I’ll have the lower receiver matched to the upper. I’m very, very pleased with it up to this point. I’ll try to have it out this weekend to shoot.