The Colorado suspect used an AR-15 pistol. Here’s what it looks like and how it differs from an AR-15 style rifle
:strip_exif(true):strip_icc(true):no_upscale(true):quality(65)/cloudfront-us-east-1.images.arcpublishing.com/gmg/JFX7GVS5SVCJRNRLG7RKCDQIEQ.jpg "Police in search of thieves who hit the victim with an AR pistol during the assault, officials say")