Legally make your own gun

They'll never take them away, really. From cold dead hands, maybe, but from the American spirit which burns and doesn't die? I don't think so. What if they change this law? I think you'll still see these items out there, and if they are grandfathered, how can anyone tell when they were finished and put together?

Here is a good FAQ on what the man is talking about on their website. Basically the lower is 80% finished, so it can be sold as a non-FFL controlled item.

Here's a page about the same thing from another company.