Replacement front sight features a highly visible white ring surrounding a self-illuminating Tritium insert that really makes the front sight stand out in all light conditions. Mounts in a standard Novak dovetail (65Adeg x .330" x .075") and can be secured with the included roll pin. Precision-machined steel body provides maximum protection of insert. Some fitting required; gunsmith installation recommended. Mfg: Novak Steel, matte black. .148" (3.8mm) wide blade. Available in .160" and .180" heights. Requires 65Adeg x .330" x . 75" dovetail