Mass shootings in the United States
Many types of guns have been used in mass shootings in the United States, including semi-automatic handguns, semi-automatic rifles, revolvers, and shotguns. Of the 172 events from 1966 to 2019 that are seen as mass public shootings in the U.S., handguns were used in 77.2% of cases and semi-automatic rifles in 25.1% of cases. From 1966 to 2019, about 77% of mass shooters in the U.S. legally bought the weapons used in the attacks.