Hundreds of the weapons advertised on KSL.com classifieds are rapid-firing military weapons with pedigrees from around the world. The proliferation of these weapons, based on military designs, including the ubiquitous AK-47 by Mikhail Kalashnikov, have become wildly popular among shooting enthusiasts. And that popularity is a grave concern to gun-control activists. "I don't know how anyone can justify having one of those weapons," says Steven Gunn, a spokesman for the... (GunPolicy.org)