I put a Burris LU-Scout base with Burris rings on a NEF Handi Rifle. My local gunsmith charged me $30 to drill & tap the barrle, install the scope and sight it in.
Weaver has a chart which gives the length, hole spacing, diameter, thickness and profile of their mounts,both one and two piece, so you could measure the diameter of the barrel where you want the mount and determine which one will work. Then the barrel will need to be drilled & tapped.
-Kees-