Top accuracy requires a level gun. Even a slight canting of your rifle will cause windage errors. The TRU Level Pic Rail features a precision level housed in the CNC machined picatinny base. This mounting system protects the level from being bumped out of plumb during hard use.
The unique location also keeps your level and scope eye piece in the same sight picture, allowing you to check the level when aiming, without raising your head from the shooting position.
If you are serious about rimfire shooting and varminting, you need a TRU Level Picatinny Mount on your tricked out Ruger 10/22.