The Weaver 48474 Top Mount Base Pairs provide a solid foundation for mounting scopes and optics on Ruger 10/22 rifles. These precision-machined aluminum bases replace the factory receiver grooves with a standardized mounting system that accepts Weaver-style rings and accessories.
What Makes This Different
Unlike basic grooved receiver mounting, these bases create a true Weaver rail interface with consistent spacing and height. The two-piece design distributes mounting stress evenly across the receiver while maintaining the rifle's low profile. Each base features precise 0.206-inch center-to-center hole spacing that matches industry-standard Weaver ring dimensions, ensuring compatibility with virtually any scope ring manufacturer.
Key Features
- Precision-machined 6061-T6 aluminum construction for strength and corrosion resistance
- Matte black anodized finish reduces glare and resists wear
- Direct replacement for factory Ruger 10/22 receiver grooves
- Standard Weaver cross-slot pattern accepts all Weaver and Picatinny rings
- Low-profile design maintains quick handling characteristics
- Includes all necessary mounting screws and hardware
- Compatible with all Ruger 10/22 variants and aftermarket receivers
These bases excel in applications requiring repeatable zero retention and accessory versatility. The rigid aluminum platform eliminates the flex common with factory grooves, particularly beneficial for precision shooting and hunting scenarios where consistent point of impact matters. The standardized mounting interface allows quick optic changes without losing zero when using quality rings.
Technical Specs
- Material: 6061-T6 aluminum alloy
- Finish: Type III hard anodized matte black
- Compatibility: Ruger 10/22 all variants
- Mounting pattern: Standard Weaver cross-slots
- Installation: Replaces factory receiver grooves
- Package: Two-piece base set with mounting hardware
- Manufacturer: Weaver Mounts
The 48474 base pairs represent a proven upgrade path for shooters seeking improved mounting reliability over factory grooves. The investment in quality bases pays dividends in consistent performance and expanded accessory options for any Ruger 10/22 platform.