The 220s I have bought came with bases- the one were from the factory and the other were simple Weavers. I used plain Jane Weaver Tip-off rings too, they have worked well on various guns for decades.
As mentioned, there can be challenges with the scope in regards to body length.I have had an old Weaver 3x, a Burris 2.5x, Bushnell 3200 3-9x and Burris 3-9x scopes on mine. I prefer the higher power scopes as I generally slug hunt to fill out antlerless tags and like the added magnification in an attempt to identify nubbins so I don't shoot a fawn buck. At the ranges I shoot, 9x is just enough most of the time but would like a bit more. If any legal deer is the goal, then the lower power scopes are fine.
