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The Modelo 1905 pistol was designed by Ferdinand Ritter von Mannlicher in 1899 and originally produced in Austria as the Mannlicher Model 1901. The Mannlicher Model 1901 was an improved version of the Model 1900, both of which were produced by Osterreichische Waffenfabrik Steyr (commonly known as Steyr). All of these models had the same basic design and operation, but minimal adjustments were made to improve each of them. The Modelo 1905 is the version of the Model 1901 that the Argentine Army purchased from Steyr in 1905. This Semi-automatic pistol has a unique elegant appearance due to the curve of the handgrip. It is single action and uses a blowback operation system to reload. Like its predecessors, the Modelo 1905 had a non-detachable magazine that could be loaded from the top with a stripper clip. ==Operation== The Mannlicher 1900, 1901 and the Modelo 1905 all use the same blowback operating system. Fowler, North, and Stronge describe blowback-operated weapons as using the pressure from the spent round to push a bolt that is located behind the round back and forth against a spring. The pressure forces the slide back against the spring and ejects the spent cartridge. Then, a new round enters the chamber and the compressed spring pushes the bolt forward again, loading the bullet into the breech, leaving the gun ready to fire again.〔 According to Fowler, North and Stronge, It is a delayed blowback operation, using a large external hammer and heavy spring. This operation is carried out by the unique design of the slide, which includes the extractor and the firing pin. Since the pistol is single action, the hammer needs to be cocked before it can fire a round. This is accomplished by the slide as it is pushed back from the gasses, which are expelled out of the cartridge once it is fired. Finally, as the slide moves back to the forward position, it chambers a new round.〔 The reason why this operation system is able to work is because the Modelo 1905 has an open top design and the barrel was screwed into the breech.〔 Borallo furthers this explanation by stating that “the design was simple: it had a fixed barrel and the triggering mechanism was installed on the sides of the frame and the recoil spring was located below the barrel”. Fowler, North, and Stronge North describe this as “…a mechanism which has been likened to that of a fine watch”.〔 There are very few moving parts, and all of them are located outside of the integral magazine in a small mainspring housing. These parts consist of a cam, mainspring, hammer, recoil spring, and the trigger group.〔 It can also be noted that the hammer is designed at close to a forty-five degree angle, whereas most handguns have a hammer that is made at about a ninety degree angle. This distinctive characteristic is due to the fact that the moving parts are in the mainspring housing which is located just underneath the slide instead of in the handle. This design also is key to the safety mechanisms of the pistol, which consists of a manual safety catch lever on the right side of the slide that stands in the way of the hammer hitting the firing pin.〔 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Mannlicher M1905」の詳細全文を読む スポンサード リンク
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