In mass shootings, four times as many people are shot when an assault weapon or high-capacity magazine is involved compared with incidents involving neither.

Everytown Research analysis of mass shootings in the United States, 2016–2025. A mass shooting is defined as any incident in which four or more people were shot and killed in a single incident. Tannuja D. Rozario and Paige Tetens, “Assault Weapons and High-Capacity Magazines,” Everytown for Gun Safety Support Fund, June 24, 2026, https://everytownresearch.org/report/assault-weapons-and-high-capacity-magazines/.

Last updated: 6.24.2026

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90%

90 percent of people killed by on-duty police are killed with a firearm.

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+62%

From 1990 to 2017, the use of high-capacity magazines in high-fatality shootings resulted in a 62 percent increase in the average death toll of mass shootings.

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If the federal ban on assault weapons and high-capacity magazines had remained in effect from 2005 through 2022, an estimated 38 public mass shootings could have been prevented.

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+52%

Data from the ATF show that recoveries of firearms in calibers associated with assault weapons rose from about 25,000 in 2020 to nearly 40,000 in 2024—a 52 percent increase.

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