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 Model No. 2 Army with Remington Arms, Smith & Wesson allowed Remington to convert Remington Model 1858 Percussion Cap revolvers into metallic cartridge .46 rimfire conversions using the Rollin White patent, against payment of a royalty fee. In 1869 the company developed a large frame break action single action revolver with an automatic empty case ejector, first produced 1870, in the calibers .44 S&W American and .44 Henry. The design is known as the Smith & Wesson Model 3. Smith & Wesson Model No. 2 Army The Smith & Wesson Model No. 2 Army a.k.a. "Model No. 2 Old Model Smith & Wesson Revolver"