The legality of bump stocks in the United States came under question following the 2017 Las Vegas shooting, which left 60 civilians dead and an additional 867 injured; the gunman was found to have fitted them to his weapons. Several states passed legislation restricting ownership of bump stocks following this shooting and the one at Marjory Stoneman Douglas High School months later, and the U.S. Justice Department banned them at the federal level in December 2018. However, on March 25, 2021, the Sixth Circuit Court of Appeals struck down the ban.