Outerimpact Ruger 10/22 Picatinny Scope Base (Extended) 0 MOA Material: Billet 6061-T6 aluminum. MOA: 0 Finish: Matte Black Coating: Type III hard coat anodized 68 Rockwell. Mounting Hardware: Four (4) 6-48 Weaver T-10 Torx Head screws (included). Additional Tools: T-10 Torx driver (not included).