The HK45 Compact Tactical V1 is a DA/SA pistol chambered in .45 ACP with a threaded barrel for suppressor or muzzle device attachment. Heckler and Koch built the Compact Tactical around the same action as the full-size HK45, shortened slightly for easier carry while keeping the 10+1 capacity. 
 

Key Specifications 

• Brand: Heckler and Koch 
• Model: HK45 Compact Tactical V1 
• UPC: 642230261365 
• Caliber: .45 ACP 
• Action: Double/Single Action (DA/SA) 
• Capacity: 10+1 rounds 
• Barrel Length: 4.57 inches 
• Weight: 27.50 oz (approximately 1.7 lbs) 
• Frame Material: Polymer 
• Grip Style: Black Interchangeable Backstrap 
• Sights Configuration: Fixed sights 
• Safety Features: Manual safety with decocker 
   

Detailed Features 

 
The threaded barrel is the headline feature here. It ships ready for a suppressor without additional work. The manual safety doubles as a decocker, so you can safely lower the hammer after chambering a round and carry it in DA mode. Interchangeable backstraps let you adjust grip circumference for different hand sizes. The polymer frame keeps weight at 27.5 oz, reasonable for a .45 ACP with a 4.57-inch barrel. Fixed sights are low-profile and suitable for standard carry use.

The HK45 Compact Tactical draws buyers who specifically want a DA/SA .45 ACP with a threaded barrel. That combination is uncommon, and most owners bought it knowing exactly what they wanted.

Build quality gets consistent praise. The grip and controls are well-regarded for a .45 ACP compact; the decocker/safety combination feels positive and the interchangeable backstraps make fit adjustments straightforward. Accuracy is reported as good at typical defensive distances, and the gun handles .45 ACP recoil predictably given its weight.

Size relative to other compact options comes up often. At 27.5 oz and 4.57-inch barrel it's on the larger end of "compact," and some owners find it borderline for concealed carry depending on build and holster choice. Aftermarket support is adequate for the basics, holsters and sights, though the selection is narrower than for Glock or Sig platforms. Pricing matches HK's market position, and most buyers accept the cost as part of choosing the platform.