The Heckler & Koch HK45C V1 is a compact .45 ACP semi-automatic pistol with a 3.94-inch polygonal rifled barrel and an 8+1 round capacity. It has a black polymer frame with a Picatinny rail and interchangeable backstrap grips. The V1 variant includes a manual safety and an ambidextrous control layout. 
 

Key Specifications 

• Brand: Heckler & Koch 
• Model: HK45C V1 
• Caliber: .45 ACP 
• Action: Semi Auto 
• Capacity: 8+1 Rounds 
• Barrel Length: 3.94 inches 
• Color/Finish: Black 
   

Detailed Features 

• 3.94-inch polygonal rifled barrel in a compact frame 
• Black polymer frame with integrated Picatinny rail 
• Interchangeable backstrap grip panels for fit adjustment 
• Ambidextrous controls 
• Manual safety on the V1 variant

The HK45C V1 gets consistent recognition for its compact size relative to the .45 ACP chambering. Owners appreciate the interchangeable backstraps, which make it one of the more adaptable grip options in its class. The polygonal barrel draws interest from owners who track long-term wear, though it does require attention to ammunition selection.

The manual safety on the V1 splits the community. Some shooters prefer the added layer of control, while others would rather run the pistol without it and opt for a different variant. The DA/SA trigger is workable but not a standout feature compared to other HK offerings.

Capacity is the most common trade-off discussion: 8+1 rounds of .45 ACP in a compact package is a deliberate compromise, and not every owner finds the balance worth it against higher-capacity 9mm alternatives. Holster availability is narrower than for the full-size HK45, and spare magazines command a premium.