BUMP Act

The BUMP Act (S 1374) bans devices that increase the firing rate of semiautomatic firearms to mimic machineguns, directly affecting owners of modified firearms. It prohibits importing, selling, or possessing devices (like "bump stocks") that speed up firing or eliminate the need for separate trigger pulls, and requires registration of existing modified semiautomatics within 120 days. The law exempts government agencies and pre-enactment modifications that are registered. This targets specific firearm modifications, not all semiautomatic weapons.