The Night Fision NF PLATE+BS 509T FITS GLOCK FS MOS delivers a premium optic mounting solution by pairing co-witnessing sights with a robust Glock MOS-compatible plate, designed to accept Holosun 509T and most optics that share this footprint while maintaining a clean, secure alignment for rapid target acquisition. Crafted from 17-4 stainless steel and finished with a hard nitride coating, this plate meets the tight tolerances required for harsh recoil, ensuring accurate fitment and repeatable zero, and it includes extra screws and an installation tool to simplify setup and field maintenance. The combination of precision machining and robust materials provides dependable durability for daily carry and competition, while the integrated co-witness capability allows shooters to maintain a reliable backup sight picture even when optics shift or fail. Ideal for Glock FS MOS platforms aiming to optimize red dot performance, this Night Fision optic plate with backup sights offers a seamless, all-in-one solution for secure mounting, fast dot alignment, and enhanced reliability across a variety of light and field conditions.