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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. 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 lock mechanism remained principally unchanged after this model. The M&P 1905 Fourth Change variant (1915). 38 M&P with a rounded or square butt, and 4-, 5-, and 6.5-inch barrels. 38 Special appear to have been sold to the civilian market. Most of the early M&P revolvers chambered in. Serial numbers for the Military & Police ranged from number 1 in the series to 20,975. Barrel lengths were 4-, 5-, 6-, and 6.5-inches with a rounded butt. These included major modification and simplification of the internal lockwork and the addition of a locking underlug on the barrel to engage the previously free-standing ejector rod. 38 Military & Police (2nd Model) was introduced, featuring substantial changes. 38 Long Colt cartridge with greater bullet weight (158 grains) and powder charge increased from 18 to 21 grains of gunpowder. 38 S&W Special (a.k.a.38 Special), a slightly elongated version of the. That same year, in response to reports from military sources serving in the Philippines on the relative ineffectiveness of the new cartridge, Smith & Wesson began offering the Military & Police in a new chambering. With this order, the Hand Ejector Model became known as the.
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In 1899, the United States Army and Navy placed orders with Smith & Wesson for two to three thousand Model 1899 Hand Ejector revolvers chambered for the M1892. The trigger return spring is a flat leaf rather than the coil spring-powered slide used in variations dating from 1905 onwards. The lockwork of the first model differed substantially from subsequent versions. Some 6,000,000 of the type have been produced over the years, making it the most popular handgun of the 20th century.
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Barrels of 2.5 inches (64 mm) are also known to have been made for special contracts. Over its long production run it has been available with barrel lengths of 2 in (51 mm), 3 in (76 mm), 4 in (100 mm), 5 in (130 mm), and 6 in (150 mm). 38 Special, double-action revolver with fixed sights. In production since 1899, the Model 10 is a six-shot. 38 Hand Ejector Model of 1899, the Smith & Wesson Military & Police or the Smith & Wesson Victory Model, is a revolver of worldwide popularity. The Smith & Wesson Model 10, previously known as the Smith & Wesson. Lend-Lease M&P dating from World War II, missing lanyard ring
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