Leupold QRW Cross-Slot Base Set 183481 Nosler M21 Matte Black

The Leupold 183481 QRW Cross-Slot Base Set delivers precision mounting for Nosler M21 rifles with quick-release convenience and rock-solid repeatability. This matte black base system eliminates the need for permanent scope mounting while maintaining zero consistency shot after shot.

What Makes This Different

The QRW (Quick Release Weaver) system sets itself apart from traditional ring mounts through its lever-actuated design that allows scope removal and reattachment without tools. Unlike standard bases that require screwdrivers and risk scope damage during removal, this cross-slot configuration provides instant detachment while preserving zero return accuracy within 0.25 MOA. The dual-lever mechanism distributes clamping force evenly across the base platform, preventing stress points that can affect accuracy over time.

Key Features

• Quick-release lever system enables tool-free scope removal and installation
• Cross-slot design provides maximum surface contact and stability
• Matte black anodized finish resists corrosion and eliminates glare
• Precision-machined from aircraft-grade aluminum alloy
• Compatible with standard Weaver and Picatinny ring systems
• Zero-return accuracy within 0.25 MOA when properly installed
• Low-profile design maintains clean rifle lines

Field performance demonstrates the practical value of quick-detach capability during hunting seasons when scopes require protection during transport or when switching between different optics for varying conditions. The base system maintains consistent point of impact through temperature fluctuations and recoil stress, making it suitable for precision shooting applications where repeatability matters. Competition shooters benefit from the ability to quickly swap optics between stages without losing zero.

Technical Specs

• Material: Aircraft-grade aluminum alloy construction
• Finish: Matte black Type III hard anodizing
• Compatibility: Nosler M21 rifle platform
• Ring compatibility: Standard Weaver and Picatinny rings
• Weight: Approximately 3.2 ounces per set
• Mounting hardware: Includes all necessary screws and washers
• Torque specification: 18-22 inch-pounds recommended
• Country of origin: United States

This base set represents a practical solution for shooters who demand both convenience and precision from their optics mounting system. The combination of quick-release functionality and zero-retention accuracy makes it an efficient choice for serious rifle applications.