The Heckler & Koch HK45 Compact V1 is a semi-automatic pistol chambered in .45 ACP with a 3.94" barrel, DA/SA trigger, and 8+1 capacity. It ships with night sights and a black polymer frame over a steel slide. Weight is 1.8 lbs (28.48 oz) unloaded. 
 

Key Specifications 

• SKU: 2024014395 
• UPC: 642230261358 
• Brand: HK 
• Model Name: HK45 Compact 
• MPN: 81000019 
• Caliber: .45 ACP 
• Action: Double/Single Action (DA/SA) 
• Capacity: 8+1 rounds 
• Barrel Length: 3.94 inches 
• Overall Length: 10.7 inches 
• Weight: 1.8 lbs (28.48 oz) 
• Sights: Night Sights 
• Grip: Black interchangeable backstrap 
• Safety: Decocker/manual safety 
• Frame: Black polymer 
• Slide: Steel 
   

Detailed Features 

The 3.94" barrel is shorter than the full-size HK45 V1's 4.46", giving up some sight radius and velocity but trimming overall length and weight. Night sights are factory installed. The interchangeable backstrap system lets the shooter adjust grip size to fit different hand dimensions. The decocker/manual safety safely drops the hammer from a cocked state. The DA/SA trigger gives a long first pull from decocked, then single-action for follow-up shots. 
 

Usage 

The HK45 Compact V1 sits between subcompact carry guns and full-size duty pistols. At 28.48 oz it's lighter than the full-size HK45 while retaining .45 ACP performance. Suited for concealed carry where a .45 ACP is desired, home defense, and range use. Night sights add utility for low-light self-defense scenarios.

Owners of the HK45 Compact V1 .45 ACP with night sights are generally positive, with a few consistent practical concerns.

Build quality and ergonomics get the most consistent praise. The H&K construction holds up well, and the interchangeable backstraps let most hand sizes find a comfortable fit. Controls are well-positioned.

Accuracy is described as solid for a compact .45 ACP. Recoil is manageable. The steel slide and 28.48 oz weight help absorb .45 ACP impulse better than lighter polymer-only compacts. Night sights are frequently called out as a useful included feature.

The criticisms are predictable: some users find 28.48 oz heavy for a compact carry gun, particularly compared to lighter 9mm alternatives. The 8+1 capacity is the standard trade-off for the .45 ACP bore. Parts availability takes more effort than with more common brands. Price is considered high by some, though generally viewed as appropriate for H&K quality.

The pistol is well-regarded by users who prioritize .45 ACP performance in a concealable format and are willing to accept the weight.