In 2004, the Brady Center to Prevent Gun Violence examined the impact of the Assault Weapons Ban, On Target: The Impact of the 1994 Federal Assault Weapon Act. Examining 1.4 million guns involved in crime, "in the five-year period before enactment of the Federal Assault Weapons Act (1990–1994), assault weapons named in the Act constituted 4.82% of the crime gun traces ATF conducted nationwide. Since the law's enactment, however, these assault weapons have made up only 1.61% of the guns ATF has traced to crime.