The Burris 1" .22 Rimfire/Airgun Med Deluxe Steel Rings Matte 420072 have long been favorites of custom gunmakers because of their strength,beauty and fit. It's easy to recognize Burris' leadership role in scope mounting systems when you consider the myriad of innovative designs and manufacturing processes that result in rock-solid performance. Each ring is made from a solid piece of steel with the top and bottom half perfectly mated.