Tru Level Savage Picatinny Scope BaseIntegral Level Helps Stop Canting and Improves Accuracy This Picatinny Rail fits Savage 10/110 short and long action rifles and features an integral level tube that you can see beneath the eyepiece when aiming a riflescope. By keeping the bubble in the middle, you can minimize or stop "canting" your rifle from side to side... And, you end up shooting more accurately. The scope base itself is Weaver style and Picatinny "Pic Rail" compatible with extra length to compensate for just about any special eye relief needs.