In the years after a 1994 assault weapons ban went into effect, the number of deaths from mass shootings fell
A prohibition has been in place before. As Biden has previously noted , bipartisan support in Congress helped push through a federal assault weapons ban in 1994 as part of the Violent Crime Control and Law Enforcement Act.
That ban was limited – it covered only certain categories of semiautomatic weapons such as AR-15s and applied to a ban on sales only after the act was signed into law, allowing people to keep hold of weapons purchased before that date. And it also had in it a so-called “sunset provision” that allowed the ban to expire in 2004.
Nonetheless, the 10-year life span of that ban – with a clear beginning and end date – gives researchers the opportunity to compare what happened with mass shooting deaths before, during and after the prohibition was in place. Our group of injury epidemiologists and trauma surgeons did just that. In 2019, we published a population-based study analyzing the data in a bid to evaluate the effect that the federal ban on assault weapons had on mass shootings, defined by the FBI as a shooting with four or more fatalities, not including the shooter. Here’s what the data shows:
