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 625 Smith & Wesson Model 625 The Smith & Wesson Model 625, is a six-round, double-action revolver chambered for the .45 ACP using moon clips. The Model 625 is an improved stainless steel version Smith & Wesson Model 22 and a direct descendant of the Smith & Wesson M1917 revolver first issued during World War I. Based on S&W's stainless steel N frame (large) revolver, the Model 625 was introduced as the .45 CAL MODEL OF 1988, in 1988 as a limited edition model intended as an International Practical Shooting Confederation (IPSC) commemorative. It was equipped with a 5-inch (127 mm)