Leupold Standard Extension Rings are what you need for your riflescope. These rings are 30mm in diameter and come in a medium height. They are made of steel and come in a matte black finish.

Specifications and Features:
Leupold
Standard Extension Rings
30mm
Medium Height
Steel
Matte Black Finish
Forged and Machined steel construction
Versatile, available for many different rifles