In 1957, the small-arms manufacturer Armalite created the AR-15—short for Armalite Rifle—at the invitation of the U.S. Army, which was seeking an effective lightweight combat weapon. When the Department of Defense reviewed a version of the rifle in 1962, during the early stages of the Vietnam War, its report stated that the gun's "lethality" and "reliability" were "particularly impressive." From forty-nine feet away, it noted, an Army Ranger fired a round into a... (GunPolicy.org)