Description
The Tundra is Proof Research’s answer to a specific problem: how do you build a bolt-action rifle light enough to carry deep into backcountry terrain without sacrificing the precision needed to make a single shot count at distance? The result is a rifle built around a carbon fiber-wrapped match-grade barrel, which sheds weight compared to a contoured steel profile while also dissipating heat more efficiently during a string of shots — a meaningful trade-off for a hunter who may need a follow-up quickly.
The action is a Defiance Ruckus, a machined bolt action known for tight receiver-to-barrel-tenon fit and a smooth bolt cycle. That foundation matters because consistent headspace and repeatable lockup are prerequisites for the sub-half-MOA accuracy guarantee Proof Research backs this rifle with. The guarantee is not a marketing figure — it is a stated commitment, and Proof Research ships each rifle with documentation to support it.
Chambering in 7mm Backcountry is a deliberate choice for long-range hunting. The cartridge is engineered to push high-BC, heavy-for-caliber 7mm projectiles at velocities that flatten trajectory and retain energy well past 500 yards, making it well-suited to open terrain where shot distances are difficult to control. The 1-in-8 twist rate stabilizes the longer, heavier bullets this cartridge was designed around — running lighter, shorter 7mm projectiles would be possible but gives up the ballistic advantage the chambering is built to deliver.
The Green Jungle Tundra carbon fiber stock is purpose-built for field carry: rigid enough to hold zero under recoil, shaped for a consistent cheekweld, and finished in a pattern suited to mixed conifer and alpine environments. The muzzle is threaded 5/8×24, leaving the shooter the option to add a muzzle device without gunsmithing.
Shipping and availability: This item must ship to a licensed FFL dealer for transfer.




