Brightest Tritium Night Sights on the market; Domed lens collimates tritium rays for a sharper sight picture; CNC Machined out of high quality steel; Black Nitride coating used to improve wear and corrosion resistance; Built in the USA with Swiss Tritium; Blade Height Style: Optics Ready Stealth are designed to be paired with pistol optics and offer approximately a lower 1/3 co-witness; Front Sight Product Options: Fluorescent ring