Leupold 170489 Standard Scope Base Matte Black Ruger American RF

The Leupold 170489 Standard Base provides a rock-solid mounting platform specifically engineered for the Ruger American RF rimfire rifle. This precision-machined base eliminates the guesswork in scope mounting while maintaining the low profile necessary for proper cheek weld and natural shooting position.

What Makes This Different

Unlike generic universal bases that require shimming or adjustment, this Leupold base features exact specifications matched to the Ruger American RF receiver dimensions. The integrated recoil lug system distributes stress across multiple contact points rather than relying on screws alone. Machined from aircraft-grade aluminum with Type III hard anodizing, it provides corrosion resistance that outlasts standard black oxide finishes by decades.

Key Features

• Precision-machined aluminum construction with matte black hard anodized finish
• Exact-fit design eliminates need for shimming or adjustment on Ruger American RF
• Integrated recoil lug system distributes mounting stress across receiver
• Standard Weaver/Picatinny ring compatibility accommodates most scope rings
• Low-profile design maintains proper scope height for comfortable shooting
• Corrosion-resistant Type III hard anodizing withstands harsh conditions
• Pre-drilled and tapped mounting holes align perfectly with factory receiver holes

Field performance remains consistent across temperature extremes and heavy use. The aluminum construction provides thermal stability that prevents point-of-impact shifts during temperature changes common with steel bases. Competitive shooters rely on this base for maintaining zero through hundreds of rounds, while hunters appreciate the lightweight construction that doesn't add unnecessary weight to their rifle setup.

Technical Specs

• Material: Aircraft-grade aluminum alloy
• Finish: Matte black Type III hard anodized
• Compatibility: Ruger American RF rimfire rifles only
• Ring Pattern: Standard Weaver/Picatinny
• Profile: Low profile design
• Installation: Uses factory receiver holes, no gunsmithing required
• Country of Origin: USA
• Manufacturer: Leupold & Stevens

This base represents the most direct path to reliable scope mounting on the Ruger American RF platform. Professional gunsmiths stock this specific model because it eliminates the fitting issues common with universal alternatives. The investment in proper mounting hardware pays dividends in maintained accuracy and scope longevity.