Fits STI 2011 pistols and cloness with front sight dovetails machined to STI specs - .300"wide x .060" deep x 60 degrees. All 2011s 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. They are offered in heights of .170" and .180"; both with a width of .125".
With proper installation these sights will also fit 1911 pistols with the Heinie style front dovetail cut.
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.