EGW Sight Mount Features The EGW Sight Mount replaces the factory rear sight on the Ruger MKI MKII MKIII MKIV 22/45 and P-series pistols installing directly into the existing dovetail to create a secure mounting platform for a Trijicon RMR or Holosun HS507C red dot sight. Machined from 7075 aluminum and finished in a durable Matte Black Hardcoat coating the mount is built to withstand the recoil and handling of daily range use without loosening or wearing prematurely. No alterations to the firearm are required for installation and the mount can be removed at any time to reinstall the factory rear sight letting shooters switch between iron sights and a red dot as needed. The mount ships complete with two 6-32 flat head screws and a 6-32 by 3/16 set screw for a secure precise fit. This mount covers a broad range of Ruger rimfire and centerfire pistols including the 22/45 Mark I Mark II Mark III Mark IV P85 P89 and P97 making it a versatile option for Ruger owners across multiple pistol generations. Installation follows a straightforward process of removing the factory rear sight fitting the EGW mount into the dovetail and torquing the provided mounting screws with blue Loctite for a secure permanent hold. At an overall length of 1.78 inches and width of 1.1 inches the mount adds minimal bulk to the slide while providing a rock-solid optic mounting surface for improved accuracy and faster target acquisition. The Matte Black Hardcoat finish also guards against corrosion and wear from repeated holstering and range use keeping the mount looking and functioning like new well beyond the factory sight it replaces. For Ruger MK-series and P-series pistol owners who want RMR or Holosun HS507C compatibility without buying an entirely new slide this EGW mount is a proven affordable solution. EGW Sight Mount for Ruger MKI-IV P85 P90 Specifications Brand: EGW Fits: Ruger MKI-IV 22/45 P85 P89 P97 Red Dot Fitment: Trijicon RMR Holosun HS507C Material: 7075 Aluminum Coating: Matte Black Hardcoat Color: Black Overall Length: 1.780 Overall Width: 1.1 Mounting Hardware: Included Available At: GrabAGun