Changing between apertures does not change the point of impact down range. The rear sight drum provides four apertures of varying diameters used to adjust the diopter system, according to the user's preference and tactical situation. The rear sight is mechanically adjustable for both windage and elevation with the use of a special tool, being adjusted at the factory for firing at 25 metres (27 yd) with standard 8 grams (123 gr) FMJ 9×19mm NATO ammunition. The adjustable iron sights (closed type) consist of a rotating rear diopter drum and a front post installed in a hooded ring. The first MP5 models used a double-column straight box magazine, but since 1977, slightly curved, steel magazines are used with a 15-round capacity (weighing 0.12 kg) or a 30-round capacity (0.17 kg empty). Features Ī view through the weapon's aperture sight #Heckler koch ump freeThe fixed, free floating, cold hammer-forged barrel has 6 right-hand grooves with a 1 in 250 mm (1:10 in) rifling twist rate and is pressed and pinned into the receiver. It fires from a closed bolt (bolt forward) position. The primary version of the MP5 family is the MP5A2, which is a lightweight, air-cooled, selective fire delayed blowback operated 9×19mm Parabellum weapon with a roller-delayed bolt. #Heckler koch ump licenseThe MP5 is manufactured under license in several nations including Greece (formerly at EBO – Hellenic Arms Industry, currently at ΕΑΣ – Hellenic Defense Systems), Iran ( Defense Industries Organization), Mexico ( SEDENA), Pakistan ( Pakistan Ordnance Factories), Saudi Arabia, Sudan ( Military Industry Corporation), Turkey ( MKEK), and the United Kingdom (initially at Royal Ordnance, later diverted to Heckler & Koch Great Britain). However, in the late 1990s, as a result of the North Hollywood shootout, police special response teams replaced most MP5s with AR-15-based rifles. The MP5 has become a mainstay of SWAT units of law enforcement agencies in the United States since then. In 1980, the MP5 achieved iconic status as a result of British special forces regiment the SAS when they stormed the Iranian Embassy in London, live on television, rescuing hostages and killing five terrorists during Operation Nimrod. In 1978, the Tropical forearm was introduced to be produced with the MP5. In 1977, the standard 20 & 30 round, curved steel magazines were introduced for the MP5A2 and MP5A3 design. In 1976, the MP5K was introduced as a request for a variant for South America. It was used in the Vietnam War in 1975 by the Green Berets. In 1974, the MP5SD was introduced, which is a suppressed variant of the MP5. In 1970, the MP5A2 and MP5A3 was introduced. The MP5A1 was introduced in the late '60s, which is the first model to have the iconic ring front sight and the slimline handguard. Work on the MP5 began in 1964 and two years later it was adopted by the German Federal Police, border guard and army special forces, referring to as the "MP64" or later "MP5". The MP5 was created within the fourth group of firearms and was initially known as the HK54. The first type was chambered for 7.62×51mm NATO, the second for the 7.62×39mm M43 round, the third for the intermediate 5.56×45mm NATO caliber, and the fourth type for the 9×19mm Parabellum pistol cartridge. Heckler & Koch, encouraged by the success of the G3 automatic rifle, developed a family of small arms consisting of four types of firearms all based on a common G3 design layout and operating principle. Despite its higher cost, the MP5 remained the more successful of the two options. In 1999, Heckler & Koch developed the UMP, the MP5's successor. The MP5 is one of the most widely used submachine guns in the world, having been adopted by 40 nations and numerous military, law enforcement, intelligence, and security organizations. There are over 100 variants and clones of the MP5, including some semi-automatic versions. The Heckler & Koch MP5 ( German: Maschinenpistole 5) is a 9x19mm Parabellum submachine gun, developed in the 1960s by a team of engineers from the German small arms manufacturer Heckler & Koch. Tilo Möller, Manfred Guhring, Georg Seidl, Helmut Baureuterġ5, 30, 40, or 50 round detachable box magazine and 100-round Beta C-Mag drum magazine
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