Smith & Wesson "N" to the largest .44 Magnum type frame. In 2003, the even larger "X" frame was introduced for the .500 S&W Magnum. Most Smith & Wesson revolvers have been equipped with an internal locking mechanism since the acquisition by Saf-T-Hammer. The mechanism is relatively unobtrusive, is activated with a special key, and renders the firearm inoperable. While the lock can simply be left disengaged, most gun enthusiasts prefer "pre-lock" guns. In 1953 the U.S. Army was looking for a pistol to replace the Colt 1911A1. To obtain a bid from the U.S. Government, Smith & Wesson began working on a
Smith & Wesson other manufacturers. Smith & Wesson's Performance Center produces the top of the line hand fitted competition version knowns as the PC 1911. While most 1911s run around , the PC 1911 is heavier, at approximately . The full-length guide rod adds some weight, and so does the add-on magazine well. During the early years of WW2, Smith & Wesson manufactured batches of the Model 1940 Light Rifle under request from the British Government. In January 2006, Smith & Wesson reentered the rifle market with its M&P15 series of rifles based on the AR-15. Unveiled at SHOT Show 2006, the rifle