Smith and Wesson’s Third Generation Pistols By R.K. Campbell Smith and Wesson began development of the Model 39 9mm pistol in response to Army interest in a new service handgun. As it turned out, the Army took thirty years to adopt a 9mm pistol and the pistol wasn’t a Smith and Wesson when adopted as the M9. But the Model 39 proved a commercial success.

Feb 1, 2012 - picked up a S&W 539 9mm have some questions. Both the Model 439 and M539 were available this way. With the manual safety in the fire position, place the hammer in the half-cock notch. Hogan's Alley, Tactics and Training, Handguns: The Semi-automatic Forum, Handguns: The Revolver Forum.

Often called an Americanized Walther P38 development of the Model 39 began in 1949 and the pistol was offered for sale in 1955. The original Model 39 is the primogenitor of all of the double action first shot Smith and Wesson pistols that followed. The Model 39 used a double action first shot trigger, a slide mounted safety that also acted as a decocker, and was chambered for the 9mm Luger cartridge. The pistol operated on time proven locked breech principles. In 1970, Smith and Wesson introduced the Model 59. The Model 59 incorporated a fifteen round magazine into the design making it the first “wonder nine” pistol as they would be called.

The Model 59 used a straight back strap that most shooters found far less ergonomic than the Model 39’s arched back strap, but the new design was deemed necessary to house a fifteen round magazine. The Model 39 and Model 59 9mm pistols are now referred to as first generation self loaders. The second generation was introduced in 1980.

These pistols featured larger sights and a slightly different appearance. Some of these pistols were supplied with high quality adjustable rear sights. Second generation pistols were offered with steel, aluminum and stainless steel frames. This generation also introduced the first compact pistols as well as the first.45 caliber pistols. The Model 645 Smith and Wesson.45 enjoyed some popularity in law enforcement circles and so did the compact 9mm pistols.

These pistols are sometimes called three digit guns as the numerical model number now contained three numbers. The Model 39 was now the 439 and the stainless Model 39 was the 639. These full size pistols, particularly the 659 high capacity 9mm pistol, were popular in law enforcement. However, the pistol’s sales suffered in comparison to quality European imports, particularly the SIG P series pistols. Smith and Wesson began an upgrade program to remain competitive. The result was arguably the finest semiautomatic pistols made by Smith and Wesson.

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