The Leupold BackCountry cross-slot one-piece base for Winchester 70 long-action rifles with 20 MOA built in (part no. 171343) extends usable elevation for long-range shooting on that classic action. Leupold machines the base from 7075-T6 aluminum for aircraft-grade strength with reduced weight, and the cross-slot pattern accepts both Picatinny and Weaver-style rings. The matte black finish reduces glare and maintains a subdued field appearance. Among 20-MOA scope bases for the Winchester 70 long action, this BackCountry configuration pairs well with lightweight BackCountry or Mark 4 aluminum rings.

Key Specifications

• The material is 7075-T6 aluminum, providing aircraft-grade strength with reduced weight.
• The base fits the Winchester 70 Long Action, ensuring compatibility with long-action receivers.
• The elevation is 20 MOA, adding downward optic angle to increase usable elevation for long-range shots.
• The mount accepts Picatinny and Weaver-style rings, allowing use with a wide range of ring options.
• The design is a one-piece cross-slot construction, delivering a rigid interface for consistent alignment.
• The finish is matte black, reducing glare and maintaining a subdued field appearance.

Frequently Asked Questions

Does this fit the short-action Winchester 70? No, this base is machined specifically for the long-action receiver footprint.

What rings pair well with this base? BackCountry or Mark 4 aluminum rings, keeping overall system weight low while maintaining repeatable zero.

Buy the Leupold BackCountry Base, Winchester 70 LA

A long-action Winchester 70 built for extended-range work deserves elevation baked into the mount, and this BackCountry base delivers exactly that. Order it from our Lubbock, Texas gun shop and it ships fast.