Posted on Wed, Mar. 24, 2004 Supes ban sales of .50-caliber riflesBy Peter FelsenfeldCONTRA COSTA TIMES Contra Costa supervisors deflected volleys from Second Amendment advocates Tuesday and prohibited the sale of a weapon they say could transform a refinery into a fiery chemical weapon.The board voted 4-0 to ban firearms dealers from distributing powerful .50-caliber rifles in the county's unincorporated areas. Supervisor Millie Greenberg of Danville was absent."I believe it's our responsibility in terms of health, safety and welfare to move ahead with this ordinance," said Supervisor Gayle Uilkema of Lafayette, who sponsored the measure along with John Gioia...