The HK45 Compact (V7) LEM is a double-action-only semi-automatic pistol chambered in .45 ACP. It has a 3.94" cold hammer-forged barrel with polygonal rifling, holds 8 rounds, and weighs 28.48 oz (1.78 lbs). Overall dimensions are 7.24" length x 5.51" height. The polymer frame and steel slide are black. Grip is polymer with interchangeable backstraps for fit adjustment. Fixed night sights come standard: 1-dot front, 2-dot rear. 
 

Key Specifications 

• Manufacturer Name: Heckler & Koch 
• Model: HK45 
• Series: Compact 
• Caliber: .45 ACP 
• Barrel Length: 3.94 inches 
• Capacity: 8 rounds 
• Weight: 28.48 oz (1.78 lbs) 
• Total Height: 5.51 inches 
• Total Length: 7.24 inches 
• Frame Material: Polymer 
• Slide Material: Steel 
• Grip Material: Polymer 
• Action Type: Double action only 
   

Features 

The LEM (Law Enforcement Modification) trigger gives a consistent double-action pull on every shot without the first-shot/subsequent-shot pull variation of a traditional DA/SA action. Ambidextrous controls, safety and magazine release, work for either hand. The integrated Picatinny rail accepts lights or lasers. Interchangeable backstraps let shooters dial in grip circumference. Polygonal rifling in the cold hammer-forged barrel is notably easy to clean.

The HK45 Compact V7 LEM .45 ACP gets strong marks for build quality and ergonomics. Owners consistently cite HK's reputation for durability, and the grip, with its interchangeable backstraps, fits a wider range of hands than most fixed-grip designs. Accuracy is rated well across the board, and the night sights get specific praise for low-light use.

The LEM trigger is the main point of debate. Some shooters like the consistent double-action pull; others, especially those coming from striker-fired pistols, find it less intuitive and prefer a lighter or crisper break. It is largely a matter of what the shooter is used to.

Size comes up in carry discussions. The compact label is accurate relative to the full-size HK45, but some owners found it still prints or sits heavily for all-day concealed carry compared to slimmer compact options. Recoil management in .45 ACP is generally rated as good given the pistol's weight. Price follows the usual HK pattern: most owners feel the quality justifies it, but budget-conscious buyers note there are capable .45 ACP compact pistols available at lower prices. Customer support experiences vary, with some owners reporting smooth interactions with H&K and others noting slow response times for parts or service inquiries.