page_title: Smith & Wesson Model 10
section_title: World War I
hierarchical_section_title: Smith & Wesson Model 10 / History / World War I
caption_attribution_description: English: M&amp;P 1905 forth change lockwork
context_page_description: The Smith & Wesson Model 10, previously known as the Smith & Wesson .38 Hand Ejector Model of 1899, the Smith & Wesson Military & Police or the Smith & Wesson Victory Model, is a K-frame revolver of worldwide popularity. In production since 1899, the Model 10 is a six-shot, .38 Special, double-action revolver with fixed sights. Over its long production run it has been available with barrel lengths of 2 in, 3 in, 4 in, 5 in, and 6 in. Barrels of 2.5 inches are also known to have been made for special contracts. Some 6,000,000 of the type have been produced over the years, making it the most popular handgun of the 20th century.
context_section_description: The .38 S&W Military & Police Model of 1905 4th Change, introduced 1915, incorporated a passive hammer block and enlarged service sights that quickly became a standard across the service revolver segment of the industry. The M&P revolver was issued in large numbers during World War I, where it proved itself to be a highly reliable and accurate weapon. Although WWI saw the rise of semi-automatic pistols, revolvers such as the M&P were used in vast numbers as semi-automatic handgun production at the time wasn't sufficient to meet the demand.
  After the War, the M&P would become the standard issue police sidearm for the next 70 years. It would also become very popular with civilian shooters, with several new models being made, including the first snubnosed 2-, 2.5- and 3-inch barrel models being made in 1936.
caption: The M&P 1905 Fourth Change variant (1915). The lock mechanism remained principally unchanged after this model.
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