H&K UMP

Heckler & Koch UMP
The Heckler & Koch UMP45 with a vertical foregrip
Type	Submachine gun
Place of origin	Germany
Service history
In service	1999–present
Used by	See Users
Production history
Designed	1990s
Manufacturer	Heckler & Koch
Produced	1999–present
Variants	See Variants
Specifications
Weight	Without magazine: 2.3 kilograms (5.2 lb) (UMP9/UMP40) 2.5 kilograms (5.4 lb) (UMP45) With unloaded magazine: 2.5 kilograms (5.5 lb) (UMP9) 2.55 kilograms (5.6 lb) (UMP40) 2.65 kilograms (5.8 lb) (UMP45)
Length	450 mm (17.7 inches), folded 690 mm (27.2 inches), stock extended
Barrel length	200 mm (8 inches)
Cartridge	.45 ACP (UMP45) .40 S&W (UMP40) 9×19mm Parabellum (UMP9)
Action	Blowback, closed bolt
Rate of fire	650 rounds per minute (UMP9/UMP40) 600 rounds per minute (UMP45)
Muzzle velocity	285 m/s (935 ft/s) (.45 ACP)
Effective firing range	100 m (9×19mm Parabellum) 65 m (.45 ACP)
Feed system	30-round detachable box magazine (UMP9/UMP40) 25-round detachable box magazine (UMP45)

Without magazine:

With unloaded magazine:

The UMP (Universale Maschinenpistole, German for "Universal Submachine Gun") is a submachine gun developed and manufactured by Heckler & Koch. The UMP has been adopted by various agencies such as the U.S. Customs and Border Protection. Heckler & Koch developed the UMP as a lighter and cheaper successor to the MP5, though both remain in production.

The UMP is a blowback operated, magazine-fed submachine gun firing from a closed bolt.

As originally designed, the UMP is chambered for larger cartridges (.45 ACP and .40 S&W) than other submachine guns like the MP5, to provide more stopping power against unarmored targets (with slightly lower effectiveness at longer range) than the MP5 (largely offered in 9×19mm, albeit with short-lived production of 10mm Auto and .40 S&W variants). A larger cartridge produces more recoil, and makes control more difficult in fully automatic firing. To mitigate this, the cyclic rate of fire was reduced to 650 rounds/min (600 rounds/min for the UMP45), which makes it one of the slower firing submachine guns on the market.

The UMP9 (the 9×19mm version of the UMP) is almost 0.2 kilograms (0.44 lb) lighter than its MP5 counterpart. Its predominantly polymer construction reduces both its weight and the number of parts susceptible to corrosion.