Product DescriptionXS Sights R3D 2.0 night sights deliver a brighter, tougher sight set designed for fast sight acquisition in both daylight and low light. The second-generation design requires 50% less force during installation and is built to withstand years of everyday carry use. The set pairs a serrated, blacked-out rear sight with a dualilluminated tritium/photoluminescent front sight to drive your focus downrange. This configuration offers a high-contrast orange glow dot for rapid indexing and a durable black nitride finish for corrosion resistance. Compatible with Glock 21 per manufacturer specification.Product Highlights Dualilluminated tritium front sight with orange photoluminescent glow dot for fast acquisition Blackedout serrated rear sight to reduce glare and sharpen focus on the front sight Durable black nitride surface finish resists wear and corrosion DIYer install rated; secondgeneration design requires 50% less installation force Rear sight ledge enables onehanded slide manipulations Specs Model: R3D 2.0 Compatibility: Glock 21 Front Ring Color: Orange Sight Type: Tritium notch-and-post; tritium rear and dualilluminated front Finish: Black nitride MPN: GL-R202P-6N UPC: 647533003803 Brand: XS Sights 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.