What Is a Bump Fire Stock?

On Sunday, Oct. 1, a country music festival in Las Vegas became the scene of a mass killing when a gunman positioned in a high-rise hotel began shooting at concertgoers. At least 58 died, and more than 500 others were injured before the shooter took his own life, according to Las Vegas TV station KXNT. During the attack, the shooter, later identified as 64-year-old Stephen Paddock, at one point managed to fire nearly 90 rounds in just 10 seconds, according to a New York Times analysis of audio posted on social media.