Fits Ruger 10/22 rifles. This Tactical 15 MOA scope base extends the range of your Ruger 10/22 by putting 15 minutes of angle (inclination) into your scope mount. This enhances the elevation adjustment of your scope so that you can zero your Ruger 10/22 for longer distance shooting. But don't worry... You'll still be able to shoot normally at short distances. The 15 minutes of angle are negligible at short distances. This 15 MOA scope base works equally well with 22LR Ruger 10/22 or 17HM2 converted Ruger 10/22. This mount is precision machined to meet Mil Spec Picatinny (Weaver style) dimensions. It's finished matte black and mounts with four screws (included). You'll need a good set of rings... We recommend our KeyLock or Warne rings. This is a special purpose 15 MOA Tactical Mount. We also have exactly the same thing in a Standard Tactical Mount. Click Here to see all of our Ruger 10/22 Scope Mounts and Scopes!