- The Supreme Court threw out a ban on bump stock devices.
- The devices allow rifles to fire bullets quickly and were used in the 2017 Las Vegas mass shooting.
- Justice Samuel Alito wrote Congress would agree with a ban, but still struck the ban down.
There's "little doubt," Supreme Court Justice Samuel Alito wrote, that Congress would have considered bump stocks akin to a machine gun.
The devices — which allow semi-automatic rifles to fire bullets at nearly the rate of machine guns — were banned by federal authorities in 2018 after the Las Vegas shooter used them to kill 60 people and wound over 400 more.
But Alito and the other conservative justices still ruled to throw out the ban, saying the text of Congress' definition of machine guns —which the ban was based on — wasn't explicit enough.
"The statutory text is clear, and we must follow it," the textualist justice wrote.
The Supreme Court on Friday struck down the Bureau of Alcohol, Tobacco, Firearms and Explosives (ATF) rule that classified bump stocks as "machine guns."
The devices use a gun's recoil to reactivate the trigger faster, allowing weapons to be fired at upwards of 800 rounds per minute.
The ATF had previously allowed the devices but reclassified them during the Trump administration after the carnage of the October 1, 2017 shooting, in which the shooter fired down on concertgoers from a nearby hotel.
But Michael Cargill, a gun shop owner from Austin, Texas, sued the federal government. He argued it had been too broad in interpreting firearms law and that Congress never explicitly meant to ban bump stocks, challenging the law on statutory grounds, not Second Amendment protections.
In its decision Friday, the court's conservative justices agreed.
Writing for the majority opinion, Justice Clarence Thomas said that the bump stock couldn't be considered a machine gun because it doesn't fire more than one bullet per trigger pull — it accelerates how many times the trigger is pulled.
"A bump stock does not convert a semi-automatic rifle into a machinegun any more than a shooter with a lightning-fast trigger finger does," Thomas wrote.
Alito, in his concurrent opinion, said the "horrible shooting spree" in Las Vegas proved that a bump stock could cause the same kind of killing as a machine gun.
But Alito said Congress needs to be explicit that it wants to ban bump stocks, too, by amending the law or passing a new one.
"Now that the situation is clear, Congress can act," Alito said.
In a dissenting opinion joined by the other liberal members of the court, Justice Sonia Sotomayor trashed the decision as "artificially narrow" and warned it'll have "deadly consequences."
"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.