Meprolight MPO-DS Back Up Tritium Night Sight Black. Specifications for Meprolight Glock MPO Back Up Tritium Night Sight: Manufacturer: Meprolight Gun Make: Glock Color: Black Front Sight Color: Green Rear Sight Color: Black Fabric/Material: Steel Gun Type: Pistol Illumination Type: Tritium Illumination Color: Green Mount Type: Dovetail Features of Meprolight Glock MPO Back Up Tritium Night Sight: No Batteries no switched - always ready for action Fast target acquisition Ready 24/7 day or night Highly durable metal construction Powered by the industry's brightest tritium available Package Contents: Meprolight Glock MPO Back Up Tritium Night Sight Meprolight 010224317101: MPO-DS Back Up Tritium Night Sight Black