As with most mass shootings in recent U.S. history, disgraced airman Devin P. Kelley’s massacre of the First Baptist Church of Sutherland Springs, Texas, has put guns in the center of the national conversation — most notably, the Ruger AR-556 that Kelley’s 2014 bad-conduct discharge for viciously beating his wife and son should have prevented him from purchasing. And while those conversations are often accompanied by wide-eyed, often nonsensical media coverage of firearms, USA Today analysis of the AR-15 favored by mass shooters is by far the most hilarious.