text:  But Trump said to the ATF, hey, I don't like those things, so why don't you go make a rule? So the ATF said, okay, well, we'll go make a rule. Well, the court overturned that 2017 bump stock ban on very similar grounds. Rather than accept the ATF's interpretation of what qualifies as a machine gun, the court pointed out, the Supreme Court did, it pointed out that the ATF was wrong in the interpretation.