Shares of gun makers rallied in premarket trade Monday, to bounce sharply off multi-month lows hit amid concerns over slowing demand. Smith & Wesson Holding Corp.'s stock swhc rose 7.8% ahead of the open, while Sturm Ruger & Co. shares RGR, +0.11% gained 4.3%. On Friday, Smith & Wesson's stock closed at the lowest level since Feb. 9, while Sturm Ruger shares had closed at the lowest level since Jan. 28. Vista Outdoor Inc.'s stock VSTO, -0.21% advanced 2% ahead of the open, after closing at a one-month low on Friday. The early gains in the stocks come in the wake of the deadliest shooting in U.S. history at a night club in Orlando, Fla. over the weekend. Also in Orlando, "The Voice" star Christina Grimmie was shot to death following a concert.