XS Sights Glock MOS Optic Plate converts a factory Glock MOS slide cut to a Trijicon RMR footprint interface, compatible with Trijicon RMR/SRO/RMR HD, Holosun 407C/507C/508T, Swampfox Kingslayer, and other RMR-pattern optics. Fits the Glock 17, 19, 34, 45, 47, and 49 (not compatible with slimline 43X/48 MOS models). CNC-machined from solid steel with a black nitride finish for wear resistance and corrosion protection, offering 30% more screw thread engagement than factory plates. Measures 1.90 x 1.05 x 0.09, weighing 0.80 oz. Includes the plate, correct-length Torx screws, Torx driver bit, and blue threadlocker. Safety Note Always ensure the firearm is unloaded before installing or adjusting any optics or bases. Verify proper torque specifications during installation. Improper mounting may affect accuracy and safety.