The Weaver 48090 Top Mount Base transforms Marlin 39A rifles into precision shooting platforms by providing a rock-solid foundation for scope mounting. This machined aluminum base eliminates the guesswork of scope installation while maintaining the classic lines of the legendary lever-action rimfire rifle.
What Makes This Different
Unlike generic mounting solutions, the Weaver 48090 features rifle-specific engineering designed exclusively for the Marlin 39A's unique receiver dimensions and mounting requirements. The precision-machined aluminum construction provides superior strength-to-weight ratio compared to stamped steel alternatives. Factory drilling and tapping specifications ensure perfect alignment without modification to the rifle's receiver.
Key Features
- Machined aluminum construction for lightweight durability and corrosion resistance
- Rifle-specific design engineered for Marlin 39A receiver dimensions
- Standard Weaver/Picatinny rail compatibility accepts all major scope ring brands
- Matte black anodized finish matches factory rifle finishes
- Precision-drilled mounting holes align with factory receiver specifications
- Low-profile design maintains rifle's classic appearance and balance
- Includes all necessary mounting hardware and installation instructions
Field performance demonstrates the base's ability to maintain zero through extended shooting sessions and temperature variations. The aluminum construction handles the moderate recoil of .22 caliber cartridges while providing the stability needed for precision target shooting and small game hunting. Weather-resistant anodized finish protects against moisture and handling wear during outdoor use.
Technical Specs
- Material: 6061-T6 aluminum alloy construction
- Finish: Matte black hard anodized coating
- Compatibility: Marlin Model 39A rifles exclusively
- Rail Standard: Weaver/Picatinny cross-slot pattern
- Mounting: Uses factory receiver drill and tap locations
- Hardware: Includes mounting screws and thread locker
- Country of Origin: United States
- Manufacturer: Weaver Optics (Vista Outdoor)
This mount base represents the most straightforward path to adding optics capability to the Marlin 39A without compromising the rifle's inherent accuracy or handling characteristics. Professional installation recommended for optimal results and warranty coverage.