You need a scope saddle like a B-square brand if the its not drilled and tapped.
As far as scope rings, I have always used Millet Brand rings.
The tactical low profile's are the one one's I use.
The scope saddle goes over your reciever and replaces the pins that hold your trigger assembly in the gun. Use the scope saddle screws to push your original pins out when you put the scope saddle on.
Good Luck! Hope this helps some.