Leupold BackCountry Scope Rings are machined from a solid piece of 7075-T6 aircraft grade aluminum for lightweight yet rock-solid strength. With a weight of only 3.2 oz., these rings won't add any noticeable weight when you're trekking through rough terrain. The ingenious, 1-piece integrated ring and mount design makes installation fast and easy. Leupold BackCountry Scope Rings secure your rifle scope in an exacting position in spite of rough treatment. 7075-T6 aircraft-grade aluminum Rock-solid strength Weighs only 3.2 oz Strong 1-piece design Easy installation