Low profile, sights feature micrometric windage/elevation adjustments with hardened click screws and a tapered dovetail for a strong lock into the existing groove. Drop-in front and rear replacements fit factory dovetails; minor gunsmithing or fitting maybe required, especially for front sight. Offers the classic, instinctive three-dot sight picture, with a choice of white dots (WD) or fiber optic dots (FO). Unless otherwise noted below, FO sights come with 1 red and 1 green set of interchangeable inserts so you can choose the color or color combination that's best for your eyes. Novak 1911 sets have standard Novak .495" x 65Adeg rear dovetail and .330" x 65Adeg front dove Mfg: L.P.A. Sights