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. This model will fit a Weatherby Mark V, has 30mm high rings, and a reversible front base.When ounces matter as much as performance, this is the mount you need. The 1-piece design makes installation straightforward and simple. Machined from a 1-piece of lightweight, 7075-T6 aircraft-grade aluminum for a lifetime of lightweight, rugged performance.