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Prototype derived from the HK54A1, first developed for the JSSAP between 1982 and 1983. It was intended to spawn a "family" of modular all-purpose submachine guns. Unique for HK, the SMG I used a simple blowback operation with separate lower and upper receivers and an easy-to-remove 5.8-inch barrel with an integral suppressor.
In burst fire the mean point of impact may shift by a maximum of 5.16 MOA/15 mrad (previously 3.44 MOA/10 mrad) after a barrel change with a barrel of the same length. [ 9 ] Optical or night sights or laser pointers can be mounted on a length of STANAG 4694 NATO Accessory Rail located on the receiver feed tray cover.
Heckler & Koch GmbH (HK or H&K; German pronunciation: [ˌhɛklɐ ʔʊnt ˈkɔx]) is a German firearms manufacturer that produces handguns, rifles, submachine guns, and grenade launchers. The company is located in Oberndorf am Neckar , Baden-Württemberg and also has subsidiaries in the United Kingdom, France, and the United States.
The barrel is 8.9 inches long, has an overall length of 21 inches, weighs about 11 lbs. unloaded, and has a rate of fire of 950 to 1,000 rounds per minute. Fixed barrel models have a "Tropical" MP5-style handguard with ventilation slots. Quick-change barrel models have a four-position Picatinny Rail handguard (usually used with a vertical ...
The UMP was designed in the 1990s by Heckler & Koch (HK), as a cheaper, lighter alternative to the MP5, [5] which made heavy use of polymers. [6] The UMP first entered production in 2000. [ 2 ] It was designed primarily for use by American military and law enforcement units, [ 7 ] as the MP5 was not available in .45 ACP, a round which was ...
The reliable functioning of roller-delayed blowback mechanisms is limited by specific ammunition and arm parameters like bullet weight, propellant charge, barrel length and amount of wear. For obtaining a proper and safe functioning parameters bandwidth Heckler & Koch offer a variety of locking pieces with different mass and shoulder angles.
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Barrel length: 149.10 mm (5.87 in) [2] Width: 39.116 mm (1.54 in) [2] ... HK was studying what aspects were most desirable in handguns for the U.S. civilian market ...