Attach a red dot sight to your pistol with ease, no slide machining needed!. This mount is compatible with Glock, M&P, and CZ models, seamlessly substituting the rear sight to transform a standard sight dovetail into an optic mount. For Ruger Mk series models, it conveniently occupies the poicatinny rail's place on the slide, facilitating a lower optic attachment without requiring a picatinny adapter.