What size rings for a K6 6x38 Weaver scope on the M305?

[Melnibonean]

I tried using the "Search" feature already. Notice I put that word in quotations. I'll leave it at that.....

Don't want to use a cheek riser, so it will need to be low. The base is an original Springfield Armory mounted on the receiver. Ideally, I would be able to still use the irons, but that's secondary