Radian Guardian optic guard for the Holosun 507COMP - designed for Glock MOS-cut slides. Steel housing wraps the optic to absorb holster wear, impact, and weight-bearing falls in place of the optic body. Critical for duty/EDC carry. Compatibility: Slide cut: Glock MOS (Gen 4 / 5) Optic: Holosun HS507COMP (open-emitter competition) Includes: Guardian optic guard + mounting hardware. GLOCK is a registered trademark of GLOCK Inc. 3CR Tactical is not affiliated with, endorsed by, or sponsored by GLOCK Inc. Any reference to GLOCK products is for identification and compatibility purposes only.