The ATF has declared scrubber pads to be a machine gun part.
I had read that as well. The 3000 other normal actions that were criminalized (possible hyperbole) during the same time frame have yet to be imposed or popularized. We are all criminals. If someone were to go out into the wilderness and meditate they would probably be breaking a half dozen laws. The entire population is guilty right here right now in the US. Selective prosecution is the method of population control as we sit.
As an addendum, I was actually placed in the back of a police car (detained) one time for meditating at the wrong spot. Over a decade ago but it did happen. I really liked that spot, but so did the bored/hiding/napping cops. Had to stop going there (public land). It was criminal of me. It’s only getting worse.