Outerimpact Red Dot Adapter/Mount for Ruger Mark I, II, III, IV, IV-Lite, 22/45 Compatible Guns: Ruger Mark I, II, III, 22/45. Will work with Tactical Solutions Pac-Lite, but requires different mounting screws. Material: Billet 6061-T6 aluminum. Compatible Red Dot Sights (Mounting Screws INCLUDED): Trijicon RMR, Doctor, Insight MRDS, Eotech MRDS, Leupold Delta Point, Leupold Delta Point Pro, Vortex Razor, Vortex Viper, Vortex Venom, Burris Fast Fire 2 & 3, CMORE RTS & STS Coating: Anodize -- Finish: Black Anodize Mounting Hardware: Two (2) 6-48 Weaver T-10 Torx Head screws (included). Two (2) alignment pins (included). Additional Tools: T-10 Torx driver (not included).