The Sandy Hook Elementary School shooting prompted an especially visceral public response due to the age of the victims. Twenty children (mostly aged 6 and 7) and six adults were killed with two semi-automatic pistols, an AR-15, and a shotgun. The tragedy sparked debate about the relevance of the Second Amendment in the era of high-capacity assault rifles. Many gun control activists drew attention to the type of weapon and the magazines the shooter obtained, which would have been illegal under the Federal Assault Weapons Ban that expired in 2004.