The USAS-12 is one of the few fully-automatic shotgun to actually be put into mass production, aside from Russian 12ga AK conversions. It was designed in the late 1980s based on the work of Max Atchisson and manufactured by the Daewoo conglomerate in South Korea. About 30,000 were made in all, mostly sold in Asia for police and military use. Importation of semiautomatic examples into the US was hindered by the Treasury Department determining them to have no sporting purpose, and thus to be legally classified as Destructive Devices under the NFA.
At Forgotten Weapons I think the most interesting guns out there are the most obscure ones. I try to search out experimental and prototype weapons and show you how they work, in addition to more conventional guns that you may not have heard of before. You’re much more likely to find a video on the Cei Rigotti or Webley-Fosbery here than an AR or Glock. So, do you want to learn about something new today? Then stick around!