It is still 100% legal to manufacture your own firearm design, expressly for your personal defense. (One, by simplicity-genius Mark Serbu, is an emerging sensation.) https://duckduckgo.com/?q=mark+serbu&t=hh&ia=videos
So when I see a headline on a U.S. Senate bill (but find no text to go with it, after three full days after introduction), I get juuuuuuuust
a bit suspicious, hey?https://www.congress.gov/bill/115th-congress/senate-bill/533/text
(Completely separate topic here, somewhat....)
Home-spun single-round shotguns are easy to build, and numerous legal exotic loads are now available for home defense, including incendiary rounds like Dragon's Breath or those with razor-sharp Flechettes. You can practice setting people on fire for only $89 per 25 rounds, or just five Flechette rounds for $17.50. These are both available in .410.
The Serbu videos open up to other useful links, equally legal and irritating to ATF.