The Smith & Wesson Model 4006 is a stainless steel frame and slide, double/single action, semi-automatic pistol introduced in 1990 by the American company Smith & Wesson along with the new .40 S&W cartridge.
The S&W 4006 features a stainless steel frame and slide double-action with 4 inch barrel, slide mounted de-cock/safety and an 11-round staggered-column magazine. It was one of the new 3rd generation S&W semi-autos, designed with input from famed gunsmith Wayne Novak of Parkersburg, WV. The 4006 introduced the new .40 S&W cartridge and featured a wrap around one piece grip made of Xenoy versus the earlier standard 2 piece grip panels, as well as low profile 3 dot Novak sights. A lightweight aluminum alloy framed S&W 4003 was produced that weighed 800 grams (29 ounces) and was more comfortable to carry. The 4046 model was a DAO (double action only) pistol in all stainless steel. The first 2 digits in the model number indicate caliber. The last digit either a 3 or 6 indicate aluminum or stainless steel frame respectively. Various safety features include a safety lever, which blocked the firing pin from the hammer and lowered the hammer, as well as a magazine safety, which kept the pistol from firing when no magazine was inserted. While a true double-action pistol, the firearm shares this magazine disconnect feature with Browning Hi-Power pistols: it cannot be fired without the magazine in place. This feature was developed to meet the needs of various law enforcement agencies interested in providing another level of safety for their officers.
The Model 4006 has been used by many law enforcement agencies as a standard duty sidearm, including by the California Highway Patrol, California State Parks and Rec., and until recently, the Colorado State Patrol. As of September 2009 both the California State Parks and Rec. Department and the Colorado State Patrol have both retired the venerable 4006 in favor of the lighter and more versatile Smith & Wesson M&P 40, also chambered in .40 S&W. From the early 2000's until 2008 the Atlanta Police Department used the 4003 TSW until replacing it with the Smith & Wesson M&P.
The model 4046 (double action only) is issued by Brink's to its armored truck crews. The 4046 was the first semi-automatic pistol to be issued by Brink's as a duty sidearm, replacing .38 caliber Smith and Wesson revolvers. As of 2011 it was being superseded by the Smith and Wesson M&P 40 in Brink's inventory, although some guards were still being issued 4046s and .38 revolvers until completion of the changeover to M&Ps.
- California Highway Patrol until 2009
- California State Parks and Rec. until 2009
- Colorado State Patrol until 2008
- Brink's armoured truck crews until 2011
- PA State Constables until 2009