Kidd Scope Base for a 10/22 or Ruger 10/22-Silver Low Review Leave a reply This fits your . Make sure this fits by entering your model number. Low scope base height is 5/16″ (about “1/4″) by 5 7/8” long Scope Base for Ruger® 10/22® extends over the barrel 1 1/4″ for increased eye relief