The Origin-12 shotgun is a semi-automatic, magazine-fed combat/tactical shotgun developed by Fostech Outdoors: like the Saiga 12 it is designed to compete with, it is primarily based on the AK action. One legally-interesting variant is the Origin 12 SBV, a short-barrel variant fitted with an arm brace: because it is not designed to be shouldered it is legally not a shotgun, being a smoothbore it is not a handgun, because it fires a shotgun shell it is not a Destructive Device, and it does not fit the criteria for an Any Other Weapon (as it is over 26 inches long), thus legally making it a non-NFA "firearm".
