Monstrum Tactical Ruger 10/22 Picatinny Rail Mount for Scopes and Optics Picatinny rail mount for Ruger 10/22 model rifles Allows for the mounting of Picatinny or Weaver standard scopes, red dots, magnifiers, or other optics Installs via included set screws into the Ruger 10/22 factory mounting holes Crafted from lightweight aluminum, 4.5 inches in length and 1.1 ounces in weight