said by bTU:The NFA doesn't ban most of those, you just need to pay a $200 tax for a stamp provided by the ATF. I have 2 short barreled rifles in 5.56 chambering that are registered with the ATF. The reason most people think they are banned by NFA is because you don't see them in most gun stores since my full auto ran me 12k, and a lot of others can run over 20k. SBR's can be built for about 900 with decent parts and another 200 for the tax stamp, and a 90 day wait from the ATF.
What confused even some pro gun folks is the provision on machine guns in the Firearms owners protection act. »
en.wikipedia.org/wiki/Fi ··· tion_Act A machine gun must be registered before May 19 1986 in order to be legally owned by civilians. No newer full autos can be registered.
So how much hassle is it to own a class III firearm? I've heard that you need to have paperwork approved just to transport them somewhere and the Feds can inspect your place to make sure they are properly stored.