New M&P Shield Pistols Chambered in 9mm and .40 S&W Available Without Single-Sided Thumb Safety SPRINGFIELD, Mass. (June 5, 2014) — Smith & Wesson Corp. announced today that it is now offering versions of its popular M&P Shield™ pistol in both 9mm and .40 S&W without the single-sided thumb safety. Brought to market after numerous...