EGW Trijicon RMR Sight Mount Features The EGW Trijicon RMR sight mount is CNC machined from 7075 aluminum and finished in a matte black hardcoat for corrosion resistance and a durable low-glare surface that matches typical slide finishes. It measures 1.78 inches long and 1.1 inches wide sized to seat directly into the factory Glock rear sight dovetail once the stock sight is removed and it is cut to accept both the Trijicon RMR and the Holosun HS507C footprint. Because the mount uses the existing dovetail rather than requiring the slide to be milled installation is fully reversible and the factory rear sight can be swapped back in at any time. This makes it a practical option for a shooter who wants to try a red dot on a duty or carry Glock without committing to a permanent slide modification. Mounting hardware is included consisting of two 6-32 flat head screws and one 6-32 by three sixteenths inch set screw with the flat head screws requiring a 5/64 inch Allen wrench for installation. EGW recommends applying blue Loctite to the mounting screws and torquing them to 15 inch pounds once the optic is placed on the mount with a small piece of paper between the optic and the mount during assembly to keep Loctite off the sight body and ease future removal. The mount is compatible with a broad range of Glock models including the 17 19 20 21 22 23 and more through the 43 though it will not fit Rock Island 1911 pistols. For a Glock owner who wants a simple no-gunsmithing path to a slide-mounted red dot this mount delivers a secure repeatable install using tools most shooters already have. EGW 49513 Trijicon RMR Sight Mount Specifications Brand: EGW Fits: Glock 17/19/20/21/22/23/24/26/27/29/30/31/32/33/34/35/36/37/38/39/41/42/43 Optic Fit: Trijicon RMR / Holosun HS507C Mount Type: Picatinny Rail Material: Aluminum Color: Black Coating: Matte Black Hardcoat Overall Length: 1.78 Overall Width: 1.1 Number of Bases: 1 Available At: GrabAGun