The HK45 was developed as a product improvement of the highly regarded USP45, first released in the 1995. The Caliber .45 ACP HK45 includes several user-inspired enhancements including changeable grip panels (backstraps), a Picatinny MIL-STD-1913 accessory rail, better ergonomics, and more ambidextrous controls.

Along with the HK45 Compact, the HK45 was developed as a possible candidate for the Joint Combat Pistol (JCP) and Combat Pistol (CP) programs administered by the U.S. military in their search for a new service handgun to replace the 9-millimeter M9. These programs were suspended before completion and no pistols were selected.

The HK45 uses an HK proprietary O-ring barrel for precise barrel-to-slide lockup and optimal accuracy. HK45 barrels are made using the famous HK cold-hammer forging process for superior performance.

• Integral MIL STD 1913 (Picatinny) rail molded into the polymer frame dust cover for mounting lights, laser aimers, and other accessories
• Ergonomic grip profiles with user replaceable grip panels to adjust the feel and grip circumference of the weapon to suit individual operator hand size and shooting preference
• HK45 grip-to-slide angle matches Model 1911’s profile
• Common high-capacity metal magazines with a capacity of 10 rounds (for both HK45 and HK45 Compact models).
• Ambidextrous controls with dual slide releases and enlarged magazine release
• Uses the proven modified Browning linkless recoil operating system
• O-ring barrel for precise barrel-to-slide lockup
• Polygonal rifling for longer barrel life and better accuracy
• Improved ergonomic control levers (safety and/or decocking)
• Low profile drift adjustable 3-dot sights
• Contoured and radiused slide with forward slide (grasping) grooves and anti-glare longitudinal ribs

Caliber: 45 ACP
Barrel: 4.46 Inches Threaded
Sights: Fixed 3-Dot
Magazines: 2 Magazines
Capacity: 10 Rounds
Weight: 1.95 lbs