Radian Guardian optic guard paired with Stealth back-up iron sights for the Holosun EPS on Glock MOS-cut slides. The Guardian wraps the optic to shield it from impact while the integrated irons co-witness through the EPS window for a redundant sighting solution. Compatibility: Slide cut: Glock MOS (any Gen 4/5 MOS-equipped pistol) Optic: Holosun EPS (closed-emitter) Includes: Guardian optic guard + Stealth iron sights + 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.