The UMP was originally designed for larger cartridges such as the .40 S&W and .45 ACP, to provide more stopping power against unarmoured targets, with slightly lower effectiveness at longer ranges.

The HK UMP is freely configurable with regard to its features. The optional equipment portfolio ranges from the classic skeleton buttstock to the use of tactical helmet buttstock variants. The UMP is available as a semi-automatic or fully automatic submachine gun.

The HK UMP45 is a select-fire 2nd generation submachine gun that operates on a direct-blowback action. Its fire controls typically include safe, semi and full-auto but Heckler & Koch can throw in a 2 or 3 round burst function if you have the proper paperwork.

Feb 1, 1999 · Available by mid-1999 the UMP45, chambered for the ever-popular .45 ACP round, is truly a compilation of HK’s decades of worldwide experience with the MP5 and the prototype weapons described above.

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Dec 12, 2024 · The HK UMP-45 is a select-fire submachine gun, meaning it can be set to fire in either semi-automatic or fully automatic modes. It’s built on a durable steel receiver with a polymer stock and forend, making it lightweight and easy to handle.

Mar 6, 2020 · H&K introduced the UMP (universal machine pistol) in an effort to attract sales from American law enforcement by offering a modern submachine gun in .45 ACP and .40 S&W calibers.

With the UMP, Heckler & Koch has developed a versatile submachine gun the likes of which did not exist before on the world market. A weapon that can cover three calibres simply by exchanging a few assemblies: 9 mm x 19, .40 S&W and .45 ACP.

Simple yet highly capable, the UMP45 includes many of the same characteristics found on the UMP40 and UMP9 models. It utilizes a 25-round straight polymer magazine, folding buttstock, bolt catch and fully ambidextrous controls as well as a user replaceable barrel. Other features and benefits include:

Notes: This Heckler & Kock UMP 45 is in "Excellent" condition, showing only very minor signs of handling and use. This rifle is HK's higher caliber, and mostly polymer SMG-style gun, but this gun was originally designed as an HK USC rifle.