The Ultradot comes with Weaver Style Rings. You should be able to tell looking at your gun if a Weaver Style Ring will work on it. Also keep in mind the length of an Ultradot. You have 4.5 Inches outside to outside on ring spacing to work with.
If a Dan Wesson takes some other type of a ring, Weigand Combat, and Warne make a base for it.