XS Standard Dot Tritium Front Sights are the finest sights made for fast sight acquisition in all light conditions. Green tritium inserts surrounded by a white outline to improve your sight picture in all conditions. Day-Light, Half-Light, or Low-Light. Fast, simple and effective. This is the ultimate self defense sight system that provides sights you can see around the clock. S&W Airlite Ti replaces pinned front sight on fixed sight guns, requires drilling for pin. Features: – Enhances sight acquisition in all light conditions – Excels in high stress defensive situations – Improves Low-Light accuracy – Low profile, snag free design Specifications: – Front Sight Only – Fits: Smith & Wesson J-Frame, Ruger SP101 – Gunsmithing Required – Front Sight: Standard Dot Tritium – Diameter: 0.140″ – Material: Blued Steel – Finish: Matte Black – Includes: Front Sight Installation Kit