Fits Colt slides having the "C-More" style front sight dovetail, that is located closer to the front of the slide than the Novak front sight cut. Please see the pictures for a comparison of the two possible dovetails and choose accordingly. Dovetail dimensions are .070" deep, .344" wide and 60° angle.
All 1911s require a front sight with correctly dimensioned and engineered dovetails to fit properly. The best front sight on the market is made by Dawson Precision and I am pleased to offer it to compliment my rear sight product line. The DP night sights are machined from hardened steel and equipped with a green Trijicon tritium lamp, surrounded by a white ring to enhance daylight visibility. This front sight is offered in a height of .180", with a width of .125".
With proper installation these sights will fit 1911 pistols with the C-More front dovetail cut including:
Colt Rail Gun
Some of the Colt M1991-A1 pistols having dovetail front sights
You can add a gold bead by adding this option: https://shop.harrisoncustom.com/113g-install-gold-bead-in-plain-black-dovetail-front-sight-2