Talley’s 30mm Bergara Premier Medium Scope Rings utilize a unique 1 piece construction. These rings have no joint between the scope and the rifle, and the unitized design means loose connections and out of alignment interfaces won’t be a problem. In addition, the 7000 series alloy provides greater durability than standard steel rings while weighing considerably less. Talley Manufacturing Talley 30mm Bergara Premier Med (Pre-2018) Alloy Lt. Wt. Ring Base Combo 740719