Weaver 48055 Top Mount Base for Mossberg 500/590/835 Shotguns

The Weaver 48055 Top Mount Base transforms Mossberg 500, 590, and 835 shotguns into versatile platforms ready for optics mounting. This precision-machined aluminum base replaces the factory receiver cover to provide a rock-solid foundation for red dot sights, scopes, and other tactical accessories.

What Makes This Different

Unlike flimsy rail adapters that clamp onto existing hardware, the Weaver 48055 integrates directly with the shotgun's receiver for maximum stability. The one-piece construction eliminates flex and maintains zero even under heavy recoil. CNC-machined from aircraft-grade aluminum with a Type III hard anodized finish, this base delivers the precision required for accurate shot placement at extended ranges.

Key Features

• Direct receiver mount design eliminates movement and maintains consistent zero
• Weaver-style rail accepts standard rings and tactical accessories
• Aircraft-grade 6061-T6 aluminum construction with Type III anodizing
• Compatible with Mossberg 500, 590, 835, and similar 12-gauge models
• Low-profile design preserves sight picture and handling characteristics
• Matte black finish reduces glare and matches factory components
• Precision-drilled mounting holes ensure proper alignment

Field testing demonstrates the base's ability to maintain point of impact through hundreds of rounds of heavy waterfowl loads and tactical buckshot. The secure mounting system prevents scope creep during rapid follow-up shots. Turkey hunters appreciate the stable platform for precise shot placement at 40+ yards, while tactical users benefit from the quick target acquisition possible with mounted red dot optics.

Technical Specs

• Material: 6061-T6 aluminum alloy
• Finish: Type III hard anodized, matte black
• Rail Type: Weaver-style cross slots
• Compatibility: Mossberg 500/590/835 series shotguns
• Weight: Approximately 3.2 ounces
• Length: 5.5 inches
• Height: 0.5 inches above receiver
• Made in USA

This mount base represents the most reliable method for adding optics to Mossberg shotguns without compromising the firearm's inherent accuracy. Professional gunsmiths and experienced shooters recognize Weaver's reputation for precision manufacturing and dependable performance in demanding conditions.