The 6-3 majority opinion written by Justice Clarence Thomas found the Justice Department was wrong to declare that bump stocks transformed semiautomatic rifles into illegal machine guns because, he said, they don’t “alter the basic mechanics of firing.”

The conservative majority that spent pages using circular logic to determine what a trigger is were wrong, and this quote is a prime example.

Edit: Hot damn, the dissent is an excellent tear down of how terrible the logic used in the majority opinion is.

This Court itself has also previously read the definition of “machinegun” in this exact statute to refer to the action of the shooter rather than the firing mechanism. In Staples v. United States, 511 U. S. 600 (1994), the Court noted that “a weapon that fires repeatedly with a single pull of the trig- ger” is a machinegun, as opposed to “a weapon that fires only one shot with each pull of the trigger,” which is (at most) a semiautomatic firearm. Id., at 602, n. 1 (emphasis added). A “pull” of the trigger necessarily requires human input.