UPDATE: 1:30 p.m. EDT — Two major U.S. gun manufacturers saw shares surge Monday in afternoon trading. Smith & Wesson Holding Corp. (NASDAQ:SWHC) gained $1.75, or 8.19 percent, by 1:30 p.m. EDT. Sturm, Ruger & Co. (NYSE:RGR) was up $5.73, or 9.93 percent.