More than 11,000 auto sears or machine gun conversion devices were recovered and traced between 2019 and 2023—a 784 percent increase from 2019 to 2023.
US Bureau of Alcohol, Tobacco, Firearms and Explosives, “National Firearms Commerce and Trafficking Assessment (NFCTA): Volume IV: Protecting America from Trafficked Firearms—Part V: Privately Made Firearms Updates and New Analysis,” January 2025, https://www.atf.gov/sites/default/files2/nfcta_volume_iv_-_part_v_0.pdf.