yeah, very nice retro you've done up. OK, when you say it's a braceman lower, do you mean that is who produces the 80 % lower, and you finished it? If not that, where did you get the 80% lower?........I'm a little confused. I'm guessing that anyone that completes an 80%er is required to engrave cerain info on the receiver. (what all is required?) I'm fairly sure that I could finish machine an 80%, as I am a toolmaker by trade and have a Bridgeport in my home shop, along with other machine shop equipement.
My first thought when I came upon this "retro" forum was to use my sp1 carbine for parts. After reading some more I think I should probably leave it alone, as it's pretty pristine with orig. box and all, and just build one from scratch. At this point not sure if that means getting NDS receivers or not, or for that matter, even which early carbine clone I should do. Guess it mostly depends on parts availability. A 607, 609, or 610 all look pretty interesting.