The ban was expected after the Justice Department earlier this year proposed a rule to classify bump stocks and similar devices as prohibited under federal law.
Trump issued a memorandum in the wake of February’s deadly shooting at Marjory Stoneman Douglas High School in Parkland, Florida, ordering the attorney general to “propose for notice and comment a rule banning all devices that turn legal weapons into machineguns,” according to Justice Department officials. Authorities reviewed more than 186,000 public comments as part of the review process.
The Justice Department opened a review of the devices in the wake of the 2017 shooting at the Route 91 Harvest Festival in Las Vegas that left nearly 60 people dead. Authorities said a gunman had bump stocks equipped to several weapons on Oct. 1, 2017, when he fired on festivalgoers.