I know this thread is a few weeks old, but I found it and figured I'd comment anyway.
The cost of a U-bend-it type receiver, or an Ace blank just seems ridiculous when you think of the work remaining to be finished. I just can't understand why I should spend $50 on a laser cut flat, or $40 on an Ace blank with rails, or $30 on a flat that probably won't bend right, when I can just save a lot of trouble and get a completed receiver for between $35-55 (plus FFL fees if any), depending on whether it's a Vulcan or OOW.
I really have wanted to build my own reciever but I can't seem to justify the expense and time when it's so much cheaper to just buy one that's finished, or nearly so.
The paper trail is a very valid point, but I guess I just haven't reached that level of paranoia yet. I have a lot of guns that fall into the nonpolitically correct category and they were all bought on yellow forms, except for my 1919a4 which was built on an 80% right side plate. But anyhow, if "The Revenue Man" comes looking for my guns, the odds are I will have already sold them all to private citizens anyway, :flip: if you know what I mean. I guess I'm more or less counting on a bit of a warning before we get to that point.
I do plan on building my own receiver at some point soon, especially since I'm about to finally get a shop press and a drill press. I'd really like to knock out a few receivers and stash them away with a few nice kits for when times get tough.