ProMag Picatinny Tactical Scope Rail for Ruger 10/22 Magnum and .17 HMR, Black Attaches directly to the integral base on the RUGER 10-22 MAGNUM Allows the use of standard Weaver rings and those for Picatinny rails, Red dot, holographic and other sights may be used as well Rail is constructed of black oxide, heat treated steel No permanent modification to the firearm required All mounting hardware included