I have a Leupold Dual Dovetail Base and Medium Rings on mine. If it is a fairly new gun it will be drilled and tapped for the mount. If I remember right you can see the hole for the base on the inside of the topstrap. They can be had at anywhere that has Leupold stuff, I think I ordered mine from Graf's. I am a big fan of the DD setup. Scope on mine is a Luepold 2x.