Full Size Adapter

The H&K USP Full Size Adapter for the Streamlight TLR-3 and TLR-4 Series lights is a precision mounting solution designed for firearms professionals and tactical shooters who need reliable weapon-mounted illumination. This adapter bridges the gap between Heckkel & Koch's USP full-size platform and Streamlight's proven tactical light ecosystem, enabling seamless integration without gunsmithing or permanent modification. For law enforcement, military, and civilian operators running modern duty weapons, this adapter represents a straightforward path to mission-critical lighting capabilities.

Engineered to exacting tolerances, the H&K USP Full Size Adapter uses precision-molded construction to secure Streamlight's TLR-3 or TLR-4 light directly to the pistol's trigger guard rail system. The adapter maintains zero shift and repeatability across repeated mounting cycles, critical for maintaining point-of-aim integrity in high-stress environments. Its compact profile—measuring 7.5 inches in length with minimal weight at just 0.02 pounds—adds negligible bulk to your carry setup while delivering rock-solid mechanical fit that eliminates rattle and unwanted movement during draw, presentation, or tactical movement.

This adapter is purpose-built for H&K USP full-size pistol owners seeking to upgrade their weapon system with a proven Streamlight tactical light. Installation is straightforward and requires no permanent alterations to your firearm; the adapter simply clicks into place on the USP's rail and accepts either the TLR-3 or TLR-4 light with a standard clamping mechanism. Whether you're outfitting a duty gun, home-defense platform, or training pistol, this adapter ensures your Streamlight illuminator sits perfectly aligned and ready for immediate deployment.