The Heckler & Koch (H&K) USP Compact in .45 ACP is a semi-automatic, hammer-fired pistol designed for concealed carry and duty use, offering the power of a large-caliber cartridge in a reduced frame. As of 2026, it remains a "workhorse" in the H&K lineup, favored for its legendary durability and unique mechanical recoil reduction system. 

Core Specifications

• Caliber: .45 ACP (capable of handling high-energy +P loads)
• Magazine Capacity: 8+1 rounds (standard flush) 
• Barrel Length: 3.78 inches (96 mm)
• Action Type: Modified Browning linkless recoil action with a specialized captive recoil spring and polymer absorber bushing
• Trigger Systems: Available in multiple variants, including DA/SA (V1) with safety/decocker or LEM (V7)