Kimber America Optic Plate, For Optic Ready Kimber 1911 to Trijicon RMR, Includes Rear Sight, Matte Finish, Black 4000939 Kimber 1911 white dot optic plate, Trijicon RMR- This co-witness optic plate work with Kimber Optic ready models with slide, under lug recess (contact customer service if your model does not have the lug recess in the slide). Made of high quality machined steel, these optic plates have a perfect degree of cant to maximize optic adjustment. Comes with mounting screws & installation instructions.