What happened that sent you to machine gun land? And no, I'm not trying to justify them. Whatever noise in your head is making you believe that, it's not coming from me.
People who do own real machine guns make sure to secure them because if they don't, they stand to lose them. These aren't the wingnuts who want to play Rambo, it's more likely that they actually have used them in military service and they often live in places where someone has enough land that allows their use. When was the last time you heard of a real machine gun being used, rather than illegally-modified guns or a bump-stock?
Millions of guns are in the hands of people who are prohibited but that's not being addressed. Personally, I think Congress is too ignorant of the facts and anything they say about guns is just to make people think they're doing something. What they need to do is go to cities where gunfire is common, so they can be shown how wrong they are. Not far from my house, New Year's Eve, once again, sounded like a war zone but sirprisingly, it didn't last long and no, it wasn't all from fireworks. Milwaukee PD call logs contain reports of 60 shots fired in 17 minutes.
When you go after machine guns, you're not looking at the real problem.