XS Sight Systems R3D Night Sights for Springfield HellCat OSP Orange. The blacked out rear increases contrast against the front sight. Available in orange or green the front sight ring is equipped with our Ember Glow Dot Technology which absorbs ambient light and glows in low light. R3D sights are the brightest options for fast and accurate shooting in bright and low light. Green is the best option for low light and has the brightest glow intensity. Orange contrasts the best in bright light settings while still maintains visibility in low light. The front sight tritium lamp is brighter than the 2 rear sight lamps reducing the possibility of mixing up the front sight tritium vial with a rear sight vial in low/no light. The front blade measures 0.145in (3.68 mm) wide and the rear notch is 0.170in (4.32 mm) wide which increases the visibility of the front sight. R3D sights are installable by sight pusher tools or by using a hammer and punch. Fits Springfield HellCat OSP. Specifications for XS Sight Systems R3D Night Sights for Springfield: Manufacturer: XS Sight Systems Gun Make: Springfield Armory Gun Model: Springfield Armory Hellcat OSP Color: Black Fabric/Material: Steel Gun Type: Pistol Front Blade Height: 0.145 in Rear Blade Height: 0.17 in Illumination Type: Tritium Features of XS Sight Systems R3D Night Sights for Springfield Steel sight with blued finish Green tritium front and rear Green photoluminescent ring front Snag-free design Package Contents: XS Sight Systems R3D Night Sights for Springfield XS Sight Systems SP-R013P-6N: R3D Night Sights for Springfield HellCat OSP Orange