About this Conversion Kit: The Luth-AR Modular Chassis Assembly - .22 LR Rimfire Rifle Chassis for Ruger 10/22 is a new, game-changing chassis for Ruger 10/22. The glass-filled nylon, aluminum, and steel. The ambidextrous chassis has a pistol grip with a rugged, deep texture. Users can easily adjust the cheek piece that has an adjustment range of two inches. The length of pull and buttpad height is also adjustable to ensure users get that customization they need.