Evolution Gun Works Trijicon RMR Sight Mount S&W 1911 Adjustable 1.780in Aluminum Matte Black Hardcoat. You can take these Evolution Gun Works Red Dot Sights & Accessories off and replace your rear sight at any time. Mounting hardware included. Installation Instructions: Remove the rear sight. Install the EGW Sight Mount in the dovetail. Tighten set screw (if applicable). Place the red dot sight on the EGW Sight Mount (placing a small piece of paper between the red dot sight and the sight mount will make for easier removal and will keep Loctite off of the red dot sight). Apply blue Loctite to the provided mounting screws. Torque mounting screws to 15in/lbs. The screws that are included with this mount require a 5/64in allen wrench for installation. Mount with MPN:49503 fits Desert Eagle Pre 2017 .Mount with MPN:49501 fits Baby Desert Eagle Post 2006 Specifications for Evolution Gun Works Trijicon RMR Sight Mount: Manufacturer: Evolution Gun Works Red Dot Sights-Footprint: RMR Included Accessories: 2 6-32 Flat Head Screws Optic Cut: Trijicon SRO Trijicon RMR Fabric/Material: 7075 Aluminum Mount Type: Dovetail Length: 1.78 in Package Contents: Evolution Gun Works Trijicon RMR Sight Mount Mounting Hardware What firearm models does the manufacturer say Evolution Gun Works Trijicon RMR Sight Mount is compatible with? The manufacturer says that Evolution Gun Works Trijicon RMR Sight Mount is compatible with EAA Witness Elite Match Magnum Research Baby Desert Eagle Sarsilmaz K2P Walther P22 Ruger 10/22 EAA Witness Hunter EAA Witness Limited EAA Witness Elite Stock II FN FNS FN FNX Smith & Wesson Model 52 Smith & Wesson M&P Heckler & Koch USP Heckler & Koch P30 Heckler & Koch P30L Heckler & Koch VP9 Heckler & Koch VP40 Heckler & Koch HK45 Compact Heckler & Koch HK45 Heckler & Koch P30SKEvolution Gun Works 49535: Trijicon RMR Sight for S&W 1911 Adjustable 1.780 in Aluminum Matte Black Hardcoat