裝了這個bump stock的槍，是不是機關槍？
兩個大法官爭論，讚同解禁的說：
“Nothing changes when a semiautomatic rifle is equipped with a bump stock,” Thomas wrote. “Between every shot, the shooter must release pressure from the trigger and allow it to reset before reengaging the trigger for another shot.”
反對解禁的說：
“今天，法院將撞火槍托重新交回了人們的手中，甚至是壞人的手中。”在提到是否應將其歸類為機關槍時，她補充稱，“我看到一隻走路像鴨子、遊泳像鴨子、叫聲像鴨子的鳥時，我會稱那隻鳥為鴨子。”
“When I see a bird that walks like a duck, swims like a duck, and quacks like a duck, I call that bird a duck,” she wrote. “A bump-stock-equipped semiautomatic rifle fires ‘automatically more than one shot, without manual reloading, by a single function of the trigger.’ Because I, like Congress, call that a machinegun, I respectfully dissent.”
