Leupold BackCountry Weatherby Mark V LT 1.18in Aluminum Scope Ring - Medium - When ounces matter as much as performance, this is the mount you need. The one-piece design makes installation straightforward and simple. Machined from a single piece of lightweight, 7075-T6 aircraft-grade aluminum for a lifetime of lightweight, rugged performance. The LT line of Leupold ringmounts and bases is specifically designed to fit Weatherby Mark V rifles chambered in .223, .243, .270, 7mm, 6.5cm, 30-06, .308, .224 WBY, .240 WBY MAG, 6.5 WBY RPM.