FX Crown scope mount

Maybe he's asking how high the scope needs to be? Of course that all depends on size of the objective lens and many other variables. It's helpful to have a selection of rings and bases on hand when you are setting up a rifle for a scope. If you are buying from a dealer they should be able to provide you with the bases and rings needed for the application. AOA (and maybe others) mount the scope and sight the rifle in before it's shipped.
 
Same Infinity scope mounts 

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High or extra high mounts depending on your scope. I had extra high rings which gave me better clearance with my magazine but I wanted adjustable rings. I switched to sportsmatch high, adjustable and they work fine but there's very little magazine clearance and not much room to move the scope forward or back. Extra high will definitely give you more mounting options and magazine clearance. Stoti