Dozens of gun control advocacy groups are active in the United States, and detailed financial information is available on at least 50. This includes groups organized as 501(c)(3) charities, 501(c)(4) social welfare organizations, and 527 political action committees. A financial analysis of these 50 groups reveals that during the two-year period covering 2019–2020, about $153 million flowed into 501(c)(3)s, about $149 million flowed into 501(c)(4)s, and about $49.1 million flowed…