Burris 420578 Signature Rings 30mm Medium Height Matte Black

The Burris 420578 Signature Rings deliver precision scope mounting with their innovative Pos-Align offset insert system that eliminates ring-to-scope stress. These 30mm medium height rings feature a matte black finish that resists glare and corrosion while maintaining professional appearance.

What Makes This Different

Unlike standard rings that force scopes into potentially misaligned positions, the Signature series incorporates Pos-Align synthetic inserts that compensate for manufacturing tolerances between rings and bases. This system reduces scope stress by up to 75% compared to conventional steel rings while providing additional elevation adjustment range. The four-screw cap design distributes clamping force evenly around the scope tube.

Key Features

• Pos-Align offset inserts eliminate ring-to-scope stress and binding
• 30mm tube diameter with medium height (0.75 inch center-to-base)
• Matte black finish reduces glare and resists corrosion
• Four-screw cap design ensures even pressure distribution
• Compatible with Weaver and Picatinny rail systems
• Synthetic inserts available in multiple offset configurations
• Precision-machined aluminum construction for consistent performance

Field testing demonstrates the Signature rings maintain zero through repeated mounting and dismounting cycles. The offset insert system proves particularly valuable on rifles where scope mounting requires additional elevation adjustment, such as long-range precision shooting or hunting applications with significant holdover requirements. The matte finish eliminates reflective surfaces that could compromise concealment during tactical operations or hunting situations.

Technical Specs

• Ring diameter: 30mm
• Height: Medium (0.75 inch center-to-base)
• Material: Precision-machined aluminum
• Finish: Matte black anodized
• Mounting: Weaver/Picatinny compatible bases
• Cap screws: Four per ring for even clamping
• Weight: Approximately 3.2 ounces per pair
• Manufacturer: Burris Optics, USA

The Burris 420578 Signature Rings represent proven engineering that addresses common scope mounting problems through innovative design rather than brute force clamping. Professional gunsmiths and precision shooters choose these rings when scope performance cannot be compromised by mounting stress.