Remember this comment ?
"You are going to need high rings = need to lift you head off the stock to see through your eye piece.....................Not good."
You want to mount your scope as low as possible so you DON"T lift your head off the stock ! That's why you want the big end of the scope called the "objective" not to be TOO LARGE.
With bases and rings that's all you need to "mount" the scope, however PLEASE have someone (gunsmith) do the mounting and bore sighting for you.
Always start "sighting-in" your new set-up at 25 or 50 yards max. before you move out to 100 yards.
Don't mean to offend, if you already know all about this..............................!?!?