In the wake of a 2017 mass shooting at a concert in Las Vegas, the Trump administration passed a regulation to ban bump stocks – a device that enables a semiautomatic rifle to fire rounds much like a machine gun. Last week, the conservative-majority Court struck down that ban in Cargill v. Garland, stating the Bureau of Alcohol, Tobacco, Firearms, and Explosives overstepped its authority in classifying bump stocks as machine guns.