Heckler & Koch HK45

The Heckler & Koch HK45 is a polymer-framed semi-automatic pistol chambered in .45 ACP, introduced in 2007. It evolved from the HK USP45 but incorporates ergonomic improvements from the P2000 and P30 series, including interchangeable backstraps and an improved grip angle. The HK45 features a 10-round magazine, a 115mm (4.53 inch) barrel, and HK's O-ring barrel for enhanced accuracy. Its reduced slide profile and ambidextrous controls make it easier to operate than the larger USP. The HK45 is used by U.S. special operations forces and law enforcement tactical units.