Dawson Precision front night sight with tritium lamp and white ring.
For Colts and other 1911 pistols with dovetail for front sight measuring .300" wide, .062" deep, 60 ° included angle.
Colt has used this dovetail configuration on some Gold Cups, some Gunsite Models, some Special Combat Government Models and others.
To order the correct front sight for your Colt, you have to measure the dovetail on the original sight as well as the distance from the centerline of the dovetail cut in the slide to the front of the slide. See pictures.
NOTICE - When you receive your new tritium sight, take it into a dark place and confirm that it glows in the dark. If it does not glow, I will exchange it, prior to installation.
After the sight has been installed, if it does not glow, the lamp has been damaged by installation. You will have to send the sight to Trijicon for replacement.