An Austin gun shop owner succeeded Friday on a years-long quest to overturn a federal ban on bump stocks, winning a 6-3 victory from the U.S. Supreme Court. Bump stocks are devices that allow semi-automatic rifles to fire hundreds of rounds in a minute. The court ruled the federal Bureau of Alcohol, Tobacco, Firearms and Explosives can not include bump stocks under legislation banning machine guns. The overturned ATF rule required owners of bump stocks to either destroy them or surrender...