[{"@context":"http:\/\/schema.org\/","@type":"BlogPosting","@id":"https:\/\/wiki.edu.vn\/all2en\/wiki14\/m21-rifle-wikipedia\/#BlogPosting","mainEntityOfPage":"https:\/\/wiki.edu.vn\/all2en\/wiki14\/m21-rifle-wikipedia\/","headline":"M21 (rifle) – Wikipedia","name":"M21 (rifle) – Wikipedia","description":"before-content-x4 M21 general information Military name: M21 Developer\/manufacturer: Army Weapons Command, Combat Development Command Limited Warfare Agency Development year: 1969","datePublished":"2021-05-01","dateModified":"2021-05-01","author":{"@type":"Person","@id":"https:\/\/wiki.edu.vn\/all2en\/wiki14\/author\/lordneo\/#Person","name":"lordneo","url":"https:\/\/wiki.edu.vn\/all2en\/wiki14\/author\/lordneo\/","image":{"@type":"ImageObject","@id":"https:\/\/secure.gravatar.com\/avatar\/44a4cee54c4c053e967fe3e7d054edd4?s=96&d=mm&r=g","url":"https:\/\/secure.gravatar.com\/avatar\/44a4cee54c4c053e967fe3e7d054edd4?s=96&d=mm&r=g","height":96,"width":96}},"publisher":{"@type":"Organization","name":"Enzyklop\u00e4die","logo":{"@type":"ImageObject","@id":"https:\/\/wiki.edu.vn\/wiki4\/wp-content\/uploads\/2023\/08\/download.jpg","url":"https:\/\/wiki.edu.vn\/wiki4\/wp-content\/uploads\/2023\/08\/download.jpg","width":600,"height":60}},"image":{"@type":"ImageObject","@id":"https:\/\/upload.wikimedia.org\/wikipedia\/commons\/thumb\/2\/2b\/Rifle_M21_2.jpg\/300px-Rifle_M21_2.jpg","url":"https:\/\/upload.wikimedia.org\/wikipedia\/commons\/thumb\/2\/2b\/Rifle_M21_2.jpg\/300px-Rifle_M21_2.jpg","height":"103","width":"300"},"url":"https:\/\/wiki.edu.vn\/all2en\/wiki14\/m21-rifle-wikipedia\/","wordCount":1029,"articleBody":"     (adsbygoogle = window.adsbygoogle || []).push({});before-content-x4M21  general information Military name: M21 Developer\/manufacturer: Army Weapons Command, Combat Development Command Limited Warfare Agency Development year: 1969 Production time: Since 1969 Model variants: XM21, XM25\/M25 Weapon category: Sniper rifle Furnishing Overall length: 1118 mm Weight: (Ungeladen)  3,950 kg Running length: 560 mm Technical specifications Caliber: 7,62 \u00d7 51 mm NATO Possible magazine fillings: 10 or 20 cartridges Number of trains: 4 Twist: To the right Visor: Rifesty tube, 3 to 9 times Closure: Rotary cap Ladeprinzip: Gas pressure loader Lists on the subject The M21 Is a self-charging and charging rifle in the caliber 7.62 mm NATO.        (adsbygoogle = window.adsbygoogle || []).push({});after-content-x4Before the beginning of the Vietnam War, the US Army used the M1D, which came from the Second World War, the M1D, which was equipped with the M84 target scope. In the introduction of the M14, no successor for the M1D had initially been planned – the sniper training was only of low status at the US Army.However, the fights in Vietnam soon showed that there was an urgent need for suitable rifles. In 1966 the M14 rifle is therefore tested with the 2.2-fold enlarged M84 targets. The final report came to the conclusion that: -The standard cartridge for the use of sniper inserts is not suitable, – the rifle scope M84 is not sufficient,        (adsbygoogle = window.adsbygoogle || []).push({});after-content-x4-The M14 is sufficiently accurate for use according to the national match specification with fiber optic-reinforced shaft and the Matchparton M118. The US Army Marksmanship Training Unit (USAMTU – a unit that trains competition shooters and also has its own workshops and gunsmith) revised the M14 National Match even further; Instead of the M84 target remote tube, a new rifle scope was tested, the functional principle of which the army lieutenant James Leatherwood had patented. The new rifle scope was based on the commercial Redfield 3-9-fold “Accurange”. In addition to a crosshairs, the forego had two horizontal and vertical bars. The horizontal beams served for the distance setting – the shooter took up his goal and adjusted the zoom of the rifle scope until the bars with top head and belt line of the target met. A tax curve postponed the foregoing in such a way that it was adapted to the measured distance. It was referred to as “Art” (Adjustable Ranging Telescope). The rifle has now been referred to as the M14 “Usamtu Accurized National Match”; In the summer of 1969, the rifle target scope combination was temporarily introduced as the “XM21 Sniper Weapon System”. In 1972 the “X” fell away. In 1988, the M21 was officially replaced by the M24 SWS as a sniper rifle in the US Army.        (adsbygoogle = window.adsbygoogle || []).push({});after-content-x4The M21 is a gas pressure loader with a rotary cap. The cartridges are borne via a pole magazine. It is largely identical to the M14, but has an artificial arcamed shaft and fiber optic bed for the system. Deduction, muzzle fire damper, gas system and locking spring were revised so that they do not negatively affect the precision. The fire selection device is constantly blocked. Despite the replacement as a sniper rifle, the weapon is still a so -called designated Marksman Rifle in the service of the armed forces. It is used where the range of the assault rifle is too low, and thus serves as a support weapon in the group (the smallest infantry unit). For this purpose, further changes such as the retrofitting of a Picatinny rail were made for the assembly of various riflescopes. A result of these modifications is the M25-an improved M21-that was developed in 1980 for the special units of the US forces. Commons : M21 – Album with pictures, videos and audio files R. Blake Stevens: Modern U.S. Military Small Arms Series \u2013 Volume One \/ U.S. Rifle M14 \u2013 from John Garand to the M21. Collector Grade Publications, Cobourg\/Ontario, Kanada, 1991, ISBN 0-88935-110-4.       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