This is a HK DA/SA known as the HK45C chambered in 45 ACP, model 81000018.
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.
Features:
Interchangeable Grip Panels
Dual Slide Release
Enlarged Magazine Release
Picatinny Rail
Polygonal Rifling
