Heckler & Koch MP5K

Heckler & Koch MP5
MP5A3 with a retractable stock and early handguard
Type	Submachine gun
Place of origin	West Germany
Service history
In service	1966–present
Used by	See Users
Production history
Designer	Tilo Möller, Manfred Guhring, Georg Seidl, Helmut Baureuter
Designed	1964–1966
Manufacturer	Heckler & Koch
Produced	1966–present
Variants	See Variants
Specifications
Weight	2.5 kg (5.5 lb) (MP5A2) 3.1 kg (6.8 lb) (MP5A3) 2.9 kg (6.4 lb) (MP5A4) 3.1 kg (6.8 lb) (MP5A5) 2.7 kg (6.0 lb) fixed stock / 2.85 kg (6.3 lb) retractable stock (MP5/10) 2.7 kg (6.0 lb) fixed stock / 2.85 kg (6.3 lb) retractable stock (MP5/40) 2.8 kg (6.2 lb) (MP5SD1) 3.1 kg (6.8 lb) (MP5SD2) 2.8 kg (6.2 lb) (MP5SD3) 2.8 kg (6.2 lb) (MP5SD4) 3.1 kg (6.8 lb) (MP5SD5) 3.4 kg (7.5 lb) (MP5SD6) 2.0 kg (4.4 lb) (MP5K, MP5KA1, MP5KA4, MP5KA5) 2.5 kg (5.5 lb) (MP5K-PDW)
Length	Fixed stock: 680 mm (27 in) (MP5A2, MP5A4, MP5/10, MP5/40) 790 mm (31.1 in) (MP5SD2, MP5SD5) 634 mm (25.0 in) (T-94 ZSG) Telescoping stock: 700 mm (27.6 in) stock extended / 550 mm (21.7 in) stock collapsed (MP5A3, MP5A5) 660 mm (26.0 in) stock extended / 490 mm (19.3 in) stock collapsed (MP5/10, MP5/40) 805 mm (31.7 in) stock extended / 670 mm (26.4 in) stock collapsed (MP5SD3, MP5SD6) 603 mm (23.7 in) stock extended / 368 mm (14.5 in) stock folded (MP5K-PDW) Receiver end cap: 550 mm (21.7 in) (MP5SD1, MP5SD4) 325 mm (12.8 in) (MP5K, MP5KA1, MP5KA4, MP5KA5) 349 mm (13.7 in) (MP5K-PDW)
Barrel length	225 mm (8.9 in) (MP5A2, MP5A3, MP5A4, MP5A5, MP5/10, MP5/40) 146 mm (5.7 in) (MP5SD1, MP5SD2, MP5SD3, MP5SD4, MP5SD5, MP5SD6) 140 mm (5.5 in) (T-94 ZSG) 115 mm (4.5 in) (MP5K, MP5KA1, MP5KA4, MP5KA5) 148 mm (5.8 in) (MP5K-PDW)
Width	50 mm (2.0 in) (MP5A2, MP5A3, MP5A4, MP5A5, MP5K, MP5KA1, MP5KA4, MP5KA5, MP5K-PDW, MP5/10, MP5/40) 60 mm (2.4 in) (MP5SD1, MP5SD2, MP5SD3, MP5SD4, MP5SD5, MP5SD6)
Height	260 mm (10.2 in) (MP5A2, MP5A3, MP5A4, MP5A5, MP5SD1, MP5SD2, MP5SD3, MP5SD4, MP5SD5, MP5SD6, MP5/10, MP5/40) 210 mm (8.3 in) (MP5K, MP5KA1, MP5KA4, MP5KA5, MP5K-PDW)

Cartridge	9×19mm Parabellum 10mm Auto (MP5/10) .40 S&W (MP5/40)
Action	Roller-delayed blowback, closed bolt
Rate of fire	800 rounds/min (MP5A series, MP5/10 and MP5/40) 700 rounds/min (MP5SD series) 900 rounds/min (MP5K series)
Muzzle velocity	400 m/s (1,312 ft/s) (MP5A2, MP5A3, MP5A4, MP5A5) 425 m/s (1,394 ft/s) (MP5/10) 315 m/s (1,033 ft/s) (MP5/40) 285 m/s (935 ft/s) (MP5SD1, MP5SD2, MP5SD3, MP5SD4, MP5SD5, MP5SD6) 375 m/s (1,230 ft/s) (MP5K, MP5KA1, MP5KA4, MP5KA5, MP5K-PDW)
Effective firing range	200 m (656 ft) (MP5A2, MP5A3, MP5A4, MP5A5) 125 m (410 ft) (MP5/10) 100 m (328 ft) (MP5/40) 100 m (328 ft) (MP5K, MP5KA1, MP5KA4, MP5KA5, MP5K-PDW)
Feed system	15, 30 or 40 round detachable box magazine and 100-round Beta C-Mag drum magazine
Sights	Iron sights. Rear: rotary drum; front: hooded post

Fixed stock:

The Heckler & Koch MP5 (from German: Maschinenpistole 5, meaning Submachine gun 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. There are over 100 variants of the MP5, including some semi-automatic versions.

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. It is widely used by SWAT teams in North America.

In 1999, Heckler & Koch developed the Heckler & Koch UMP, the MP5's successor; both are available as of 2016^[update].

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. 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. 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 two years later it was adopted by the German Federal Police, border guard and army special forces.

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