XS Sights Glock MOS Optic Plate converts a standard factory Glock MOS slide cut to an Aimpoint ACRO footprint interface, compatible with 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, it offers 30% more screw thread engagement than standard factory plates to reduce screw shearing under recoil. 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.