ProMag Picatinny Tactical Scope Rail for Ruger 9mm Carbine, Black Attaches directly to the integral bases on the RUGER 9mm and .40 SandW carbine Allows the use of standard weaver rings and those for Picatinny rails Red dot, holographic and other sights may be used as well The rail is constructed of black oxide, heat treated steel No permanent modification to the firearm required; all mounting hardware included