Midwest Industries Smith & Wesson RMR Red Dot Sight Mount Black. Will fit most K L N and X frame firearms. Allows mounting of Aimpoint Acro or Trijicon RMR pattern red dots depending on the model purchased. Specifications for Midwest Industries Smith & Wesson RMR Red Dot Sight Mount: Manufacturer: Midwest Industries Color: Black Red Dot Sights-Footprint: RMR Features of Midwest Industries Smith & Wesson RMR Red Dot Sight Mount Provides a super clean OEM look Constructed from Hard Coat Anodized 6061 Aluminum for a lifetime of service Lifetime Warranty Package Contents: Midwest Industries Smith & Wesson RMR Red Dot Sight Mount Midwest Industries MI-SWRDM-RMR: Smith & Wesson RMR Red Dot Sight Mount Black