Tactical Solution's 10/22 Picatinny Scope Base easily mounts on any factory Ruger 10/22 rifle. The 15MOA rail is a step up adding an extra 15 Minutes of Angle for long range shooting.The Tactical Solutions 15 MOA scope rail is specifically designed for those Ruger 10/22 owners who plan to shoot at longer distances (50 yd 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. Features: Long-distance shooting - our 15 MOA is perfect for shooting 50 yards but also works well at closer distances Extremely lightweight made of aircraft grade aluminum Easy to install on the 10/22, holes in the rail line-up with the factory 10/22 holes, rail comes with installation screws