In a landmark decision that reshapes the gun-rights landscape in one of the nation's most restrictive states, the U.S. Court of Appeals for the 3rd Circuit has struck down New Jersey's long-standing ban on so-called "assault firearms" and its cap on large-capacity magazines. The ruling, handed down by the full Philadelphia-based court sitting en banc, found that both restrictions violate the Second Amendment. Background: New Jersey's Decades-Old Firearms Law New Jersey's firearms regulations dat …