XS Sight Systems DXW Standard Dot for Colt Gov 5in Novak Rear Suppressor Height Tritium Front White Stripe Rear. Fits 1911 With Novak front sight cut and adjustable BoMar LPA/BCMS/Novak Rear/trapezoidal style rear cut. XS Sights feature a Standard Dot Tritium front sight and express rear sight with a white stripe for fast sight acquisition in all light conditions. Standard Dot is larger than most fronts to be seen under stress but covers less of the target than the Big Dot. White dot reflects ambient light for visibility in low light. Shallow V-Notch rear provides an unobstructed view of the front sight along with a greater field of view down range especially when moving and shooting. Day-Light Half-Light or Low-Light just indot the iin and center the dot over your target within 15 yards. Outside Diameter Standard Dot 0.140in; fits in common holsters. Installation requires .330 X 65degrees Front Dovetail cut and filing to fit sight to dovetail do not use a sight press/pusher tool. Specifications for XS Sight Systems DXW Standard Dot Sight - Colt: Manufacturer: XS Sight Systems Gun Make: Colt Gun Model: Colt 1911 Government 5in Color: Matte Black Front Sight Color: Tritium Green Rear Sight Color: White Fabric/Material: Steel Tritium Gun Type: Pistol Illumination Type: Tritium Illumination Color: Green Additional Features: Standard Dot Last Chance: Yes Mount Type: Dovetail Barrel Length: 5 in Finish: Matte Features of XS Sight Systems DXW Standard Dot Sight - Colt Requires Front .330 X 65degree (.250 X 60degrees X .050) Dovetail Cut. Red Threadlocker & Allen Key Package Contents: XS Sight Systems DXW Standard Dot Sight - Colt Red Threadlocker or Red Threadlocker &amp Allen Key What firearm models does the manufacturer say XS Sight Systems DXW Standard Dot Sight - Colt is compatible with? The manufacturer says that XS Sight Systems DXW Standard Dot Sight - Colt is compatible with Colt 1911 Government 5inXS Sight Systems NE-0017S-4: DXW Standard Dot for Colt Gov 5in Novak Rear Suppressor Height Tritium Front White Stripe Rear