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US Mass Shootings Firearm Types

The types of firearms used in mass shootings in the US, particularly handguns and assault-style rifles.

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Jan 14, 2026
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What is the most common firearm type used in US mass shootings?

Handguns are the single most common firearm type present in U.S. mass shootings, even as semi‑automatic “assault” rifles are disproportionately represented among the deadliest incidents (handguns: mos...