Steyr A1 [S, C, M, L] & Steyr A2 [L9, M9, C9] red dot mount | type C [RMR, RTS, Docter footprint]Red dot mount for Steyr A1 models, including Steyr S A1, C A1, M A1, L A1 and M9 A1 models. Compatible also with Steyr A2 models, including Steyr L9 A2, M9 A2 and C9 A2 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.