Heckler & Koch Universal LEM Kit – HK45 & USP Full-Size

The Heckler & Koch Universal LEM Kit converts standard double-action/single-action HK45 and USP full-size pistols to the Law Enforcement Modification (LEM) trigger system. LEM delivers a consistent, smooth trigger pull for every shot—no manual decocking required. The system automatically resets the hammer to a partially cocked position after each firing cycle, providing a lighter, more predictable pull than traditional DA while maintaining the safety of a hammer-down carry. This conversion is popular among duty users and competitive shooters who prioritize trigger consistency and speed.

This factory kit includes all necessary internal components for a complete conversion. Installation requires disassembly of the pistol's fire control group and familiarity with the platform's internals. Professional installation by a qualified gunsmith is recommended unless you have prior experience with pistol trigger systems. All parts are manufactured to factory specifications with proper heat treatment and finish.

• Part Type: Trigger System Conversion Kit
• Compatible Firearms: HK45 Full-Size, USP Full-Size (9mm, .40 S&W, .45 ACP)
• Material: Steel (internal components)
• Finish: Factory
• Installation: Professional Recommended
• Includes: Complete LEM trigger components and springs