Question, with the bulit in receiver rails, why would one want to add a rail?
A lot of folks don't like to use the dovetail because most rings don't come with pins or a recoil lug so ring slippage is a real possibility. Especially on hard recoiling chamberings.
The Sportsmatch rings linked above are a really good choice. If you want to spend a bit more and get a "rail" that still uses the dovetail, then I would suggest the Raptor mount from Mountain Tactical.
https://www.mountaintactical.com/shop/raptor-mount-1-inch-low-0-moaThey will get you about as low as you can get and still take full advantage of the recoil lug recess on the top of the receiver.