Now, if you thread a barrel, you’re under ITAR & need to pony up a few thousand a year and I’m sure submit to rectal inspections (not really. Those would be less intrusive than the paperwork you need to keep).
Clinton killed off small dealers, making it so fraught with peril to sell small that people gave up. I refuse to get a suppressor because of the legalities & cost. This is working as designed. They can’t ban guns, so they’ll just make them so legally dangerous to look at that many people will find another hobby that’s not as regulated. Eventually, the culture dies. It’s the long game and one that’s been played for many years already.