CZ-USA 40089 CZ Rings 527 Matte Black 30mm Medium
https://www.tandktactical.com/shop/806703400891-cz-usa-40089-cz-rings-527-matte-black-30mm-medium-25510
https://www.tandktactical.com/web/image/product.template/25510/image_1920?unique=c28ac12
30mm Aluminum Scope Rings for CZ 527.
