RE: scope base that allows use of iron sights.
It Depends on your Budget if You want some of the best then go with the Waren Steel bases & rings ( Pricey )
If they make a See Thru.
I found that if you just use a MED ring and keep your scope on 3X or 4X you will be just fine as you can always up the power for longer ranges .
most of the SEE THRU rings will lift your head up off the stock to far to shoot compfertable or Accuratly.