Product DescriptionXS Sights R3D 2.0 night sights deliver a brighter, tougher sighting system engineered for fast target acquisition in both bright and low light. This second-generation set installs with 50% less force than the original design and features a serrated, blacked-out rear sight paired with a dual-illuminated tritium photoluminescent front sight. The high-contrast green glow dot drives focus downrange, while the durable Black Nitride finish is built for years of everyday carry. Designed to fit Glock 21 pistols, R3D 2.0 is a premium notch-and-post solution for defensive shooting.Product Highlights Dual-illuminated tritium front sight with photoluminescent green glow dot for rapid sight acquisition Blacked-out, serrated rear sight reduces glare and increases contrast with the front Black Nitride surface finish for enhanced wear and corrosion resistance Rear sight ledge enables one-handed slide manipulations DIYer-rated installation requiring approximately 50% less force than prior generation Specs Compatibility: Glock 21 Sight Type: Tritium night sights (front and rear) Front Outline Color: Green Front Sight: Dual-illuminated tritium photoluminescent glow dot Rear Sight: Anti-glare blacked-out serrated design with ledge Finish: Black Nitride Construction: CNC machined steel Brand: XS Sights MPN: GL-R202P-6G UPC: 647533003810 Disclaimer: 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.