The Tactical Solutions 15 MOA Scope Rail is specifically designed for those Ruger 10/22 owners who plan to shoot at longer distances (50 yards or further). This best-selling 15 MOA Picatinny scope base allows short-range shooting but is also the perfect scope rail for long-range 10/22 shooting by allowing slight elevation of the objective-end of the scope as compared to standard rails. Our 15 MOA rail is manufactured from strong durable and light-weight aluminum. It is extremely easy to install and screws needed for installation are included.