The U.S. Supreme Court, which expanded gun rights in a major decision in June, on Monday declined to hear a challenge to a federal ban on devices called "bump stocks" that enable semi-automatic weapons to fire like a machine gun - a firearms control measure prompted by a 2017 Las Vegas mass shooting.
The justices turned away appeals by a Utah gun lobbyist named Clark Aposhian and firearms rights groups of lower court rulings upholding the ban as a reasonable interpretation of a federal law prohibiting machine gun possession.
