JTM Sports Ruger 1022 10 22 10/22 10-22 Low Profile See-Through Weaver Picatinny Red Dot Scope Reflex Sight Mount Aluminum T6 6061, 4.65" Long with 11 Slots a Imported JTM Sports Official Product , Made of T6 6061 Aluminum and great finish on the surface . This Ruger 10/22 Low Profile Picatinny Rail Mount is built for Ruger 10/22 rifles. It allows for the mounting of Picatinny / Weaver 7/8" standard scopes, red dots, magnifiers, or other optics. The rail installs via the included set screws into the Ruger 10/22 factory mounting holes. See-through allows using the original iron sight. Installs via included set screws into the Ruger 10/22 factory mounting holes Include : Ruger 10/22 Rail and 5 set screws ( you will need 4 , 1 extra in case if missing ) Length : 4.65 " Weight : 1.1 Oz