The Ruger American Rifle Gen 2 Length of Pull Spacer provides adjustment to the Ruger American Gen II stock's length-of-pull (LOP). The correct length-of-pull improves the rifle's comfort and feel and improve accuracy by making shoulder placement and sight acquisition faster and more consistent. The rifle ships with a 13.75''length-of-pull spacer installed. The spacers in this kit allow additional adjustment to the rifle's LOP. The spacers included in the kit provide a 12.75" or 13.25" LOP when installed. Change spacers by loosening the recoil pad assembly and installing the appropriate spacer. Only one spacer can be utilized at a time; spacers cannot be stacked for extra-long LOP. Changing spacers is quick and easy using a 3/16''hex wrench and 7/16''socket or wrench. FeaturesSpacers included in the kit provide a 12.75" or 13.25" LOPMounting hardware includedCorrect LOP provides a conistent shoulder placement and faster sight acquisition Note: A 1/8''hex wrench or similar tool is ...