By Ben Kesling and Zusha Elinson
Aug. 5, 2019 6:44 pm ET
The gunman who killed nine and wounded at least 27 in Dayton, Ohio, used an AR-15 style pistol in his attack, according to police, a smaller variation on the popular gun that has been used in many of the deadliest mass shootings.
The pistol, which has grown in popularity as major gun manufacturers started promoting it
