Ruger 90004 Scope Base Set - Black Steel for No. 1 & No. 3 Rifles

The Ruger 90004 Scope Base Set transforms single-shot rifles into precision shooting platforms by providing a rock-solid mounting foundation for optics. This black steel base set specifically fits Ruger No. 1 and No. 3 rifles, creating the stable platform needed for consistent long-range accuracy. Factory-engineered dimensions ensure perfect alignment with the receiver's drilled and tapped holes.

What Makes This Different

Unlike generic aftermarket bases that require gunsmithing modifications, this factory Ruger base set drops directly into place using existing factory holes. The precision-machined steel construction maintains zero through heavy recoil cycles that would shift lighter aluminum alternatives. Each base undergoes quality control testing to meet Ruger's manufacturing tolerances of ±0.001 inches for ring alignment.

Key Features

• Factory-engineered fit for Ruger No. 1 and No. 3 single-shot rifles
• Precision-machined steel construction with corrosion-resistant black finish
• Standard Weaver/Picatinny rail compatibility for ring mounting
• Uses existing factory-drilled receiver holes - no gunsmithing required
• Two-piece design distributes mounting stress across receiver length
• Maintains proper eye relief positioning for various scope lengths
• Includes all necessary mounting hardware and installation instructions

Field testing demonstrates this base set maintains zero consistency through magnum cartridge recoil forces exceeding 30 foot-pounds. The steel construction resists flexing under scope tube stress, particularly important for long-range varmint hunting where sub-MOA accuracy matters. Temperature cycling from -20°F to 120°F shows no measurable shift in point of impact when properly torqued to specification.

Technical Specs

• Material: Heat-treated carbon steel with black oxide finish
• Compatibility: Ruger No. 1 and No. 3 single-shot rifles
• Rail Standard: Weaver/Picatinny compatible
• Mounting: Uses factory receiver holes (6-48 thread pitch)
• Ring Spacing: Accommodates scopes from 32mm to 56mm objective
• Torque Specification: 15-18 inch-pounds per mounting screw
• Country of Origin: United States
• Manufacturer Part Number: 90004

This factory base set eliminates the guesswork and potential problems associated with aftermarket alternatives. Professional gunsmiths recognize Ruger factory components for their consistent quality and precise manufacturing tolerances that ensure reliable performance season after season.