The Weatherby WBY 307 Builders Action Magnum Standard Blk is a purpose-built long-action receiver and bolt assembly designed for shooters who want to start a custom rifle on a proven foundation. This standalone action features Weatherby’s modern Model 307 two-lug bolt with a smooth 90-degree throw and tool-less takedown, making disassembly and maintenance straightforward while preserving the brand’s precision machining heritage.

Because it is supplied without barrel, stock, trigger, sights, or magazine, the Model 307 Builders Action Magnum Standard is ideal for enthusiasts and gunsmiths planning a tailored hunting or long-range range rifle. The .540-inch magnum bolt face and multi-caliber compatibility support a wide range of magnum cartridge builds, while the graphite black Cerakote finish on the bolt and knob helps resist wear and corrosion. It’s a flexible starting point for a refined custom project backed by Weatherby’s long-standing reputation for craftsmanship and innovation.

Key Features:

• Manufacturer: Weatherby
• Model: Model 307 Builders Action Magnum Standard
• Action: Bolt Action
• Overall Length: 8.7 inches (long action)
• Weight: 1.78 pounds (long action)
• Bolt Face Diameter: .540 inch magnum
• Bolt Throw: 90-degree two-lug bolt
• Bolt Knob Threads: 5/16-24
• Tenon Threads: 1-1/16-16, .880 inch long (Standard 700)
• Mag Box Length: 3.95 inches (long action)