Smith & Wesson Model 640
|Place of origin||USA|
|Manufacturer||Smith & Wesson|
|Weight||22.58 oz. ; 15.8 oz for alloy version|
.38 Special +P
|Effective firing range||22.86 meters|
|Maximum firing range||45.72 meters|
|Feed system||5-round cylinder|
The Smith & Wesson Model 640 revolver is a 5-shot snubnosed revolver that is chambered in either .38 Special or .357 Magnum calibers. Like other "J-frame" Smith & Wesson revolvers, it has a swing-out cylinder, but this model features a concealed hammer, and is part of the Centennial line. The Model 640 is an approved off duty/ back-up weapon for the New York City Police Department.
The first model was chambered in .38 Special and fitted with a standard barrel of 1-7/8 inch length. The second model had a slightly heavier and longer barrel of 2-1/8 inch length. The gun was constructed entirely of stainless steel until 1995, when models were made in aluminium and designated "airweight".
A 3" barreled version was offered until 1993, when it was dropped from production. That same year S&W introduced the Model 940, similar in appearance, but chambered in 9mm Luger. In 1996 the 940 was dropped and S&W began chambering the 640 in .357 Magnum. Because of the power of the .357 magnum cartridge, the frame is strengthened just in front of the cylinder release on those models.
In spite of its small frame and short barrel the revolver is durable and fairly accurate. Firearms writer, Joe Gorman, fired 500 full power rounds through the revolver and it survived still tight and still in time.
- "Model 640". Smith & Wesson. Retrieved 4 May 2012.
- Ayoob, Massad (2010). Massad Ayoob's Greatest Handguns of the World. Gun Digest Books. pp. 218–220. ISBN 978-1-4402-0825-6.
- Hartink, A.E. (2003). The Complete Encyclopedia of Pistols and Revolvers. Edison, New Jersey: Chartwell Books, Inc. p. 225. ISBN 978-0-7858-1871-7.
- Supica, Jim; Richard Nahas (2007). Standard Catalog of Smith & Wesson. Iola WI: Krause Publications. p. 151.
- Joe Gorman (2012). "Smith and Wesson Model 640 Survival Test". Shooter's Report. Retrieved December 6, 2012.