Give your optics and accessories 7" of mounting length with the Weaver Extended Multi-Slot Base. This multi-slotted, single-piece rail is designed to fit on Winchester 70 Short Action rifle and offers Picatinny and Weaver mounting compatibility. To offer help with elevation compensation, the rail also provides 20 MOA of a built-in cant. It is made of lightweight and durable 6061-T6 aluminum alloy and treated with corrosion- and abrasion-resistant Type III hard anodized finish.