Hope this helps someone.. Sig scopes have short main tubes. Since Axis rifles are supplied with 2 piece, Weaver style mounts, you will have some difficulty in acquiring scope rings that are narrow enough to mount your scope. Even is you are able to get rings to fit, eye relief will become an issue.
I solved the problem by purchasing a Leopold Rifleman 1 piece base which offers more options (slots) for ring spacing.
I used Vortex "hunter" Medium riflescope rings.
No more problems!