Leupold 51738 Standard Scope Base Winchester 70 Long Range Matte

The Leupold 51738 Standard Base transforms Winchester Model 70 Long Range rifles into precision shooting platforms with rock-solid scope mounting capabilities. This machined aluminum base replaces factory mounting systems with enhanced rigidity and repeatable zero retention across thousands of rounds.

What Makes This Different

Unlike stamped steel factory bases, this precision-machined aluminum construction eliminates flex under heavy recoil and thermal cycling. The base features exact Winchester 70 Long Range receiver contours for perfect fit without gunsmithing modifications. Leupold's proprietary mounting geometry maintains consistent scope alignment even after repeated scope changes, delivering sub-MOA accuracy potential that factory systems cannot match.

Key Features

• Precision-machined 6061-T6 aluminum construction for maximum strength-to-weight ratio
• Winchester Model 70 Long Range specific receiver contours for perfect factory fit
• Matte black anodized finish resists corrosion and eliminates glare
• Standard Leupold ring spacing accommodates most variable power scopes
• Cross-slot design accepts Leupold standard rings and most third-party options
• Factory drilled and tapped holes require no gunsmith modifications
• Lightweight profile adds minimal weight to rifle system

Field performance demonstrates exceptional zero retention through temperature extremes and heavy magnum recoil cycles. The rigid aluminum platform eliminates the scope shift common with factory plastic and stamped steel bases, particularly important for long-range precision shooting where quarter-MOA shifts become magnified at extended distances. Professional shooters and hunters rely on this base system for consistent accuracy in competition and field conditions.

Technical Specs

• Material: 6061-T6 aluminum alloy construction
• Finish: Matte black Type III hard anodizing
• Compatibility: Winchester Model 70 Long Range actions only
• Ring spacing: Standard Leupold dimensions
• Mounting: Factory drilled receiver holes, no modifications required
• Weight: Approximately 2.1 ounces
• Country of Origin: United States
• Warranty: Leupold lifetime guarantee

This base represents the foundation of accurate long-range shooting systems, where scope mounting integrity directly impacts downrange performance. The investment in quality mounting hardware pays dividends in consistent accuracy and eliminates the frustration of shifting zeros that plague inferior mounting systems.