I like to use bkl rings. After using these I don't think I would ever swap back to any other rings. For dovetail anyways. They are fairly high so should work with your 50mm scope. I actually have a set here and can measure them for you if you like.https://www.pyramydair.com/product/bkl-30mm-rings-3-8-or-11mm-dovetail-matte-black?a=2905