NFA required registration, still does, of all NFA guns.
That's why a $200 Sten Mk II now retails for $4850.
That’s true, but many, many many more people own “assault weapons” than ever owned NFA weapons. And if they outlaw their expanded definition of “assault weapons” (basically any magazine fed semi-auto) we will effectively be disarmed. Might as well not have the 2nd amendment at all.