The Night Fision NF PLATE+NS 509T FITS GLOCK FS MOS offers a premium co-witnessing sight solution packaged with your optic plate, delivering precision, durability, and value for shooters mounting a red dot on Glock MOS pistols such as the 19, 17, 45, and 47 among others, excluding Slimline models. Crafted from 17-4 stainless steel and finished with a protective nitride coating, these plates are built to withstand harsh recoil while maintaining a secure, accurate fit with tight tolerances. The pack includes a Tritium Front Sight for fast target acquisition in low light, extra screws, and an installation tool for an easy, drift-free setup, ensuring compatibility with the Holosun 509T and co-witnessing with most optics sharing the same footprint. This combination plate embodies Night Fisions emphasis on quality and reliability, enabling a seamless integration of iron sights and red dot sighting systems on Glock MOS platforms while providing a robust mounting surface designed to endure rigorous field use and range sessions.