Boston Officials Add To 'Assault Weapons' List Boston city councilors passed a petition to add three guns to the city's ban on so-called "assault weapons," the Boston Herald reports. The guns include the FN Herstal Five-Seven, which is not even approved for sale in Massachusetts; Smith and Wesson's Model 500 Revolver; and the Barrett .50-caliber rifle. NSSF is working to oppose the ban. The petition must be approved by the mayor and state legislators before it becomes law.