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 4506 4567-NS. Only 1236 were produced in the 1992 single year production. Smith & Wesson Model 4505: Rare blued carbon steel version of the 4506, only about 1,200 manufactured in 1992 Smith & Wesson Model 4586: A double-action-only version of the 4566, with a partially preset hammer and no external safety/decocker. The issued sidearm of the Idaho State Police from 1992-2002. Smith & Wesson Model 4506 The Smith & Wesson Model 4506 is a third-generation semi-automatic pistol from Smith & Wesson's 4500 series of handguns. The 4506 is chambered for the .45 ACP cartridge and, with the purchase of special springs,