I guess I misunderstand regarding the hangun to rifle thing and back. My understanding was if you purchased an AR lower and identified it on a 4473 as a handgun it would then, of course, could be built into a handgun (barrel less than 16" and no stock) and be considered a handgun but it could be made into a rifle at a later date and changed back at will. If was registered as a rifle initally, it could never legally be made into a pistol. That is what my FFL (a trusted friend) led me to believe. Is that incorrect?