Heckler & Koch MP5
The Heckler & Koch MP5 (From Maschinenpistole 5 - German: "machine pistol model 5") is a 9mm submachine gun of German design, developed in the 1960s by a team of engineers from the German small arms manufacturer Heckler & Koch GmbH (H&K) of Oberndorf am Neckar.
It is currently used by the armed forces and law enforcement units of over 40 countries. The MP5 remains one of the most widely deployed of all current submachine guns and has been developed into a family with numerous variants.
In the 1990s, Heckler & Koch developed the Heckler & Koch UMP, the MP5's successor, though both remain in production.
History
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), where the first type was chambered in 7.62x51mm NATO, the second—using the 7.62x39mm M43 round, third—the intermediate 5.56x45mm NATO caliber and the fourth type—chambering the 9x19mm Parabellum pistol cartridge. The MP5 was created within the fourth group of firearms and was initially known as the HK54.
Work on the MP5 began in 1964 and scarcely two years later it was adopted by the German Federal Police, border guard and army special forces.
The submachine guns are manufactured under license in several nations including: Greece (formerly at EBO - Hellenic Arms Industry, currently at EAS - Hellenic Defense Systems), Iran (Defense Industries Organization), Mexico (SEDENA), Pakistan (Pakistan Ordnance Factories), Sudan (Military Industry Corporation), Turkey (MKEK), and the United Kingdom (initially at Royal Ordnance, later diverted to Heckler & Koch Great Britain).
Design details
The primary version of the MP5 submachine gun family is the MP5A2, which is a lightweight, air-cooled, selective fire delayed blowback operated 9x19mm Parabellum weapon with a roller-delayed bolt. The weapon fires from a closed bolt (bolt forward) position.
The 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.
Variants
MP5A1: No buttstock (endplate/receiver cap in place of buttstock), "Navy"/"SEF" trigger group.
MP5A2: Fixed buttstock, "SEF" trigger group.
MP5SFA2: Fixed buttstock, single-fire (SF) trigger group.
MP5A3: Retractable buttstock,"SEF" trigger group.
MP5SFA3: Retractable buttstock, single-fire (SF) trigger group.
MP5A4: Fixed buttstock, 3-round burst trigger group.
MP5A5: Retractable buttstock, 3-round burst trigger group.
MP5-N: Model developed specifically for the U.S. Navy. Ambidextrous "Navy" trigger group, 3-lug/threaded barrel for attaching a sound suppressor; retractable stock.
MP5F: Model developed specifically for the French military. Rubber-padded retractable stock, ambidextrous sling loops/bolts and internal modifications to handle high-pressure ammunition.
MP5K: Short (Kurz) version, "SEF" trigger group.
MP5KA1: MP5K with smooth upper surface and small iron sights; "SEF" trigger group.
MP5KA4: MP5K with 3-round burst trigger group.
MP5KA5: MP5KA1 with 3-round burst trigger group.
MP5K-N: MP5K with "Navy" trigger group and 3-lug/threaded barrel for mounting suppressors or other muzzle attachments.
MP5K-PDW: Personal Defense Weapon; MP5K-N with added folding stock and 3-lug/threaded barrel for mounting of suppressors; "Navy" or 3-round burst trigger group. Introduced in 1991.
MP5SD1: No buttstock (endplate/receiver cap in place of buttstock), "SEF" trigger group, integrated suppressor (Schalldämpfer)
MP5SD2: Fixed buttstock, "SEF" trigger group, integrated suppressor.
MP5SD3: Retractable buttstock, "SEF" trigger group, integrated suppressor.
MP5SD4: No buttstock (endplate/receiver cap in place of buttstock), 3-round burst trigger group, integrated suppressor.
MP5SD5: Fixed buttstock, 3-round burst trigger group, integrated suppressor.
MP5SD6: Retractable buttstock, 3-round burst trigger group, integrated suppressor.
MP5SD-N1: Retractable buttstock, "Navy" trigger group, KAC stainless steel suppressor.
MP5SD-N2: Fixed buttstock, "Navy" trigger group, KAC stainless steel suppressor.
MP5/10: Chambered in 10mm Auto, available in various stock/trigger group configurations. It was produced from 1992 to 2000.
MP5/40: Chambered in .40 S&W, available in various stock/trigger group configurations. It was produced from 1992 to 2000.
HK94: American import model of the MP5 with a 16 in barrel and special safe/semi-automatic trigger group, designed for civilian use. It was made from 1983 to 1989, in three different configurations.
SP89: Sport Pistole M1989. Semi-automatic only version of the MP5K designed for civilian use. It had a modified foregrip redesigned into a traditional handguard to make it compliant with the Semi-Auto Weapons Ban of 1989. It was made from 1989 to 1994.
HK54: This was the original model that was produced in the mid 1960s. It later became known as the MP5A1, a very slightly modified version.
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