The Weatherby Model 307 Long-Action Builder’s Action (Weatherby part no. 3WBLS) is a stand-alone, long-action rifle action finished in graphite black Cerakote, built for shooters and gunsmiths who want to assemble a custom bolt rifle from the ground up. It represents Weatherby’s first all-new action design in over 50 years, engineered around a 2-lug bolt with a tool-less takedown that comes apart for cleaning and maintenance without special tools. This Standard-bolt-face version is sized for non-magnum long-action cartridges, and its Remington 700-pattern tenon threads and mounting footprint mean it accepts the wide range of aftermarket stocks, triggers, scope rails, and bottom metal already on the market. Because it ships as a bare action rather than a complete rifle, it is intended for a custom build rather than an off-the-shelf hunting rig.

Key Specifications

• Uses a standard .470-inch bolt face, sized for non-magnum long-action cartridges rather than magnum-head rounds.
• Features a tool-less 2-lug bolt that breaks down for cleaning without special tools.
• Cut with Remington 700-pattern tenon threads (1-1/16-16, .880-inch long), compatible with the wide range of 700-pattern stocks, triggers, and bottom metal on the market.
• Finished in graphite black Cerakote on the bolt and bolt knob for corrosion resistance.
• Weighs about 1.78 pounds as a bare action, keeping a finished custom build light.

Frequently Asked Questions

Does this include a barrel or stock? No, this listing is the bare action only, built for custom rifle projects that pair it with an aftermarket barrel, stock, and trigger.

What cartridges fit the standard bolt face? The .470-inch standard bolt face is sized for non-magnum long-action cartridges; magnum-head rounds require the Magnum bolt-face version of this action.

Buy the Weatherby Model 307 Long-Action Builder’s Action

Start a custom long-action build on the same platform Weatherby spent years engineering from scratch, compatible with the huge aftermarket built around the 700-pattern footprint. It fits naturally alongside our bolt action rifles selection for shooters building rather than buying complete. As a firearm receiver, it ships from our Lubbock, Texas gun shop to your local FFL for transfer — get in touch and we will have it moving as soon as it’s ready.