Leupold QR Base and Rings. Absolutely the best base and rings I have ever used. I have the QR onseveral rifles including two omega's. They really do return to zero when taking the scope off and on. I always pull the scopes when cleaning and they are right on every time. I don't even bother to re-check zero.

If you want to retain usage of the factory sights, go with the High Rings and a scope with an objective no larger than 33mm.

Good Luck!

Tahquamenon