Justice Sotomayor, dissenting in the bump stock case:   "Today, the Court puts bump stocks back in civilian hands. To do so, it casts aside Congress's definition of 'machinegun' and seizes upon one that is inconsistent with the ordinary meaning of the statutory text and unsupported by context or purpose. 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. A bump-stock-equipped semiautomatic rifle fires 'automatically more than one shot, without manual reloading, by a single function of the trigger.' §5845(b). Because I, like Congress, call that a machinegun, I respectfully dissent."