Product DescriptionUpgrade your Smith & Wesson J-Frame revolver with the XS SIGHTS Standard Dot Front Sight. Designed for models with a pinned front sight and fixed rear, this second-generation sight features a pre-drilled retaining pin hole for straightforward DIY installation-no custom gunsmithing required. The tritium-powered center with a bright photoluminescent green ring delivers exceptional visibility in low light, enabling faster acquisition and more repeatable alignment than factory ramp sights. CNC-machined steel construction ensures durability while maintaining compatibility with standard holster options. Common compatible models include the 640 and 340 PD in .38 Special/.357 Magnum.Product Highlights Tritium-powered front sight with photoluminescent green ring for superior low-light visibility Pre-drilled pinhole enables quick, easy DIY installation Fits .38 Special/.357 Magnum Smith & Wesson J-Frames with pinned front sight and fixed rear (e.g., 640, 340 PD) Standard Dot design promotes fast sight acquisition and consistent alignment Durable CNC-machined steel construction; designed to work with standard holsters Specs Product Type: Front sight for revolvers Compatibility: Smith & Wesson J-Frames with pinned front sight and fixed rear Calibers Supported: .38 Special / .357 Magnum Color/Illumination: Green photoluminescent ring with tritium center Construction: CNC machined steel UPC: 647533001151 MPN: SWRV001P4 Brand Name: 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.