U.S. Supreme Court hears 'bump stocks' gun case

WASHINGTON — A divided U.S. Supreme Court heard arguments on Wednesday on the legality of "bump stocks," simple devices that can allow rapid fire from otherwise semi-automatic guns.

The case stems from the worst mass shooting in US history, in October 2017, when a man fired on a crowd attending an outdoor music concert in Las Vegas, killing 58 people and wounding around 500.

Most of his 22 guns were equipped with bump stocks, allowing them to fire as many as nine bullets a second.