I am confused. Is the ATF forcing pistol braced firearms to be legally "SBR"s or are they creating an entirely new and separate NFA category of "Pistol Braced Firearms" where said firearm is required to have a pistol brace on it? Or are the pistol braced firearms just being lumped into the SBR category and you can Form 1 them and then throw your pistol brace away and legally put a real stock on the firearm?