Heckler & Koch UMP45
Heckler & Koch · Submachine Gun · Discontinued · 1999
Also known as: UMP45, Universal Machine Pistol, UMP .45
Overview
The Heckler & Koch UMP45 is a select-fire submachine gun chambered in .45 ACP, produced by Heckler & Koch GmbH since 1999. Featuring a 25-round magazine capacity, this submachine gun offers generous firepower for duty use and home defense.
Specifications
| Weight (empty) | 2268 g (80.0 oz) |
| Weight (loaded) | 2620 g (92.4 oz) |
| Overall Length | 690 mm (27.17") |
| Folded Length | 450 mm (17.72") |
| Barrel Length | 200 mm (7.87") |
| Height | 210 mm (8.27") |
| Width | 50 mm (1.97") |
| Action Type | Blowback |
| Firing Mechanism | Hammer Fired |
| Trigger Type | Single Stage |
| Magazine Capacity | 25 rounds |
| Magazine Type | Detachable Box |
| Muzzle Velocity | 285 m/s (935 fps) |
| Muzzle Energy | 606 J (447 ft·lbf) |
| Effective Range | 100 m (109 yd) |
| Maximum Range | 300 m (328 yd) |
| Rate of Fire | 650 rpm |
| Barrel Rifling | Right Hand |
| Rifling Twist | 406 mm (15.98") |
| Number of Grooves | 6 |
| Frame Material | Polymer |
| Slide Material | Steel |
| Barrel Material | Steel |
| Stock Material | Polymer |
| Finish | Black |
Calibers
- .45 ACP · primary — also known as .45 Auto, .45 Automatic Colt Pistol, 11.43x23mm
Features
- Firing modes: Semi Automatic, Burst 2, Full Automatic
- Feed systems: Detachable Box Magazine
- Safety mechanisms: Ambidextrous Safety Selector, Firing Pin Safety
- Features: Closed Bolt Operation, Folding Stock, Picatinny Rail, Ambidextrous Controls, Threaded Barrel, Polymer Construction
Variants
Service history
Operators
- United States Customs and Border Protection
- Jordanian Special Operations Forces
- Royal Thai Navy SEALs
- Malaysian Maritime Enforcement Agency
- German Law Enforcement · adopted 1999
- U.S. SWAT Teams
Production
Production years: 1999-2020s
The .45 ACP and .40 S&W variants have been discontinued; only the UMP9 remains in production. Exact production figures undisclosed.
Origin
Country of origin: Germany
Notes
The UMP was designed to be more economical than the MP5, targeting markets where cost was a primary concern. While the UMP9 (9x19mm) proved most successful globally due to NATO standardization and lower recoil, the UMP45 appealed primarily to American law enforcement agencies that preferred the .45 ACP's stopping power. Production of .40 S&W and .45 ACP variants has since been discontinued, with only the UMP9 remaining in production as of 2020s. The civilian USC variant features a 16-inch barrel and lacks select-fire capability. The UMP's simplified blowback mechanism makes it less refined than the MP5 but significantly cheaper to manufacture.
Background
The UMP was designed as a cheaper, lighter successor to the legendary MP5, trading the complex roller-delayed blowback system for a simpler direct blowback mechanism. While it never achieved the MP5's iconic status, the UMP45 found favor with American law enforcement agencies who valued the .45 ACP's stopping power.