The 45 ACP HK45 includes several user-inspired enhancements including changeable grip backstraps; Picatinny MIL-STD-1913 accessory rail; better ergonomics; O-ring barrel for precise barrel-to-slide lockup and optimal accuracy and cold-hammer forging process for superior performance; threaded barrel; USP-style control lever, a combination AMBI safety and decocking lever, is frame mounted on the HK45 and is quickly accessible. The HK45 control lever has a positive stop and returns to the fire position after decocking. Includes an extra backstrap and two magazines.
| Guns | |
| Action | Double-Action / Single-Action |
| Barrel Length | 5.2" Threaded |
| Caliber | .45 ACP |