Trijicon CA428-C-600757 RMR Mount, 1911 with Integrated Night Sight Set: black Front/Rear Outline with Green Lamps Fits: 1911/2011 platforms (black front & black rear Outline with green lamps) Color: black RMR mount with integrated night sights allow lower 1/3 co-witness of the front post Fits 1911/2011 platforms Fits all Trijicon RMRs Integrated night sights Allow lower 1/3 co-witness of the front post Professional Gunsmithing Required