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.

The Heckler & Koch HK45 (Heckler & Koch, .45 ACP) is a semi-automatic pistol designed by the German arms manufacturer Heckler & Koch.

The HK45 pistol is the culmination of years of innovative German engineering. This .45 ACP HK 45 features changeable grip panels, a Picatinny MIL-STD-1913 accessory rail, better ergonomics, and more ambidextrous controls. These pistols are far superior to any others on the market.

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For more than half a century, HK® has been a leading designer and manufacturer of small arms and light weapons for law-enforcement and military forces worldwide. The HK 45 Semi-Auto Centerfire Pistol

The HK45 Compact Tactical builds on the tough, military lineage of the Heckler & Koch HK45 series of handguns to devise the ultimate operator’s pistol.

Feb 28, 2013 · The HK45 is assembled in the United States from U.S.- and German-made components at Heckler & Koch's new manufacturing facility in Newington, N.H. It is a big gun, a 10+1 shot .45 ACP pistol that's almost six inches tall and more than 7.5 inches long with a standard-length barrel.

The HK45C is the compact class of the HK45 family. It differs mainly in size, but not in handling. The frame of the HK45C has a smooth but easy-to-grip contoured texture to ensure a high level of safe gripping. The HK45C’s short and compact design supports discreet concealed carry.