Meprolight Tru-Dot Adj Sight for Ruger Gp100 Red Hawk Super Red Hawk-G/G Black Green Tritium. Both rear and front tritium sources will appear green during lowlight and no light scenarios providing the upmost confidence for you to make hits when it counts. The Mepro Tru-Dot pistol sights are drop-proof shock-proof and the Tritium illumance is guaranteed for 12 years MEPROLIGHT Self Illuminated Pistol Sights pistol sights require no batteries. They are always on always ready 24 hours a day 7 days a week 365 days a year. Specifications for Meprolight Tru-Dot Adj Sight for Ruger: Manufacturer: Meprolight Gun Make: Ruger Gun Model: Ruger GP100 Revolver Color: Black Front Sight Color: Green Gun Type: Revolver Illumination Type: Tritium Illumination Color: Green Package Contents: Meprolight Tru-Dot Adj Sight for Ruger Meprolight 209973101: Tru-Dot Adj Sight for Ruger Gp100 Red Hawk Super Red Hawk-G/G Black Green Tritium 209973101