Product DescriptionNight Fision's Optic Plate + Backup Sight Combo delivers a robust mounting solution for Holosun 509T optics on Glock MOS pistols, paired with a high-visibility tritium front sight and a blank, serrated rear. Machined from premium 17-4 stainless steel and finished with a durable nitride coating, the plate is engineered to withstand harsh recoil and maintain a secure, repeatable fit. The included sights provide a lower 1/3 co-witness for confident targeting in bright or low-light conditions, and the kit ships with extra screws and an installation tool for an easy setup.Product HighlightsComplete combo: optic plate plus tritium yellow front and blank serrated rear backup sightsEngineered for Holosun 509T footprint and Glock MOS pistols (excludes Slimline models)Co-witness setup for fast transitions between red dot and iron sightsPrecision machined from 17-4 stainless steel with a protective nitride finishIncludes hardware and installation tool for a secure, straightforward mountSpecsCompatibility: Glock MOS pistols (non?'Slimline), e.g., 17, 19, 45, 47 MOSOptic Compatibility: Holosun 509T footprintCo-Witness: Lower 1/3 with included backup sightsMaterial: 17-4 stainless steelFinish: Nitride coatedOptic Plate Thickness: 0.2 inIncluded: Optic plate, tritium yellow front sight, blank serrated rear sight, extra screws, installation toolColor: BlackUPC: 810138540923MPN: GLK-OPBS-509T-MOS-YGZXBrand: Night FisionDisclaimer: We strive to provide accurate and up-to-date product descriptions, specifications, and images; however, errors or omissions may occasionally occur. We are not responsible for any inaccuracies or discrepancies in the content provided. If you notice anything incorrect or unclear, please contact us so we can correct it. When in doubt, we recommend verifying details directly with the product's manufacturer.