Mossberg [500, 535, 590, 835, 930, 935] red dot mount | type C [RMR, RTS, Docter footprint]Red dot mount for Mossberg 500 models. Fits also Mossberg 535 models, 590 models, 835 models, 930 models and 935 models. Replaces the rear sight and allows mounting red dots with Trijicon RMR, C More RTS and Docter footprints. No slide milling or permanent modifications required. Full compatibility list is below. Machined from durable aluminium in USA by Outer Impact.