DPP Titanium Rear Sight Mount/Mounting Plate Compatible with Glock Models It has one of the lowest bore axes in the industry without any alterations on your pistol. Remove the rear sight on your firearm and replace it with our mount in order to mount your Red Dot Sight. You can take our mount off and replace your rear sight at any time. Installation hardware and tools included(304 Stainless Steel Anti Flicker sealing plate included).0.13"saddle height. One-Piece Design, Lightweight. This provides a steady sturdy and rugged mount that will hold your zero, We focus on improving every detail. Compatible with: 9mm model: 17?19?26?34?45 .357 model: 31?32?33 .40 model: 22?23?24?27?35 .45 Auto model: 21?30?36?41 .45 G.A.P model: 37?38?39 10mm AUTO model: 20?29 Not fit all mos model Compatible with Red Dot Sights (Mounting Screws INCLUDED): Trijicon RMR/SRO Holosun 407C/507C&508T Installation Instructions: Remove the rear sight Slide mount plate into rear sight dovetail *May need press or rubber hammer Tighten dovetail socket set screws Place the red dot sight on mount plate then tighten the mount screws