Researchers estimate that if we still had a federal law prohibiting assault weapons, we’d see 70 percent fewer mass shootings deaths.

DiMaggio et al., “Changes in US mass shooting deaths associated with the 1994-2004 federal assault weapons ban: Analysis of open-source data,” Journal of Trauma and Acute Care Surgery (2019) https://doi.org/10.1097/TA.0000000000002060.