Ruger 10/22 1 Piece Base - 10MOA Matte Aluminum Ruger 10/22 One piece base - 10MOA Full width and depth recoil slots provide maximum bearing surface for recoil key engagement Bases securely mount to your firearm with Torx-style T-15 Socket cap screws, 25 in/lb. of torque is recommended MOA base can be used to gain more usable elevation in the scope Mounting hardware included