Proof Research

Bolt-Action 338 Caliber Carbon Fiber Barrels - 338 Caliber 9.4 Twist 28" Carbon Fiber Sendero Barrel

All Proof Research barrels
Proof Research Bolt-Action 338 Caliber Carbon Fiber Barrels - 338 Caliber 9.4 Twist 28'''' Carbon Fiber Sendero Barrel - Barrel for AR-15 - view 1
Proof Research Bolt-Action 338 Caliber Carbon Fiber Barrels - 338 Caliber 9.4 Twist 28'''' Carbon Fiber Sendero Barrel - Barrel for AR-15 - view 2
Proof Research Bolt-Action 338 Caliber Carbon Fiber Barrels - 338 Caliber 9.4 Twist 28'''' Carbon Fiber Sendero Barrel - Barrel for AR-15 - view 3
Proof Research Bolt-Action 338 Caliber Carbon Fiber Barrels - 338 Caliber 9.4 Twist 28'''' Carbon Fiber Sendero Barrel - Barrel for AR-15 - view 4
Proof Research Bolt-Action 338 Caliber Carbon Fiber Barrels - 338 Caliber 9.4 Twist 28'''' Carbon Fiber Sendero Barrel - Barrel for AR-15 - view 5
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Proof Research

Overview

The Proof Research 338 Caliber Carbon Fiber Barrel is designed to elevate the performance of your bolt-action rifle. With a 28-inch length and optimized for .338 caliber, this barrel offers a balance of weight reduction and rigidity, enhancing accuracy and reducing recoil during shooting sessions. Builders often incorporate this barrel into long-range hunting and precision shooting setups, where accuracy and performance are paramount.

Specifications

MPN108789
Caliber.338
Barrel Length28

Available Merchants(2)

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Brownells
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$779
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BattleHawk Armory
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$779
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Build history on GunPartPicker

Builders have been adding the Proof Research Bolt-Action 338 Caliber Carbon Fiber Barrels - 338 Caliber 9.4 Twist 28" Carbon Fiber Sendero Barrel to their builds on GunPartPicker since March 2026. All time, it ranks #393 of the 844 barrels builders have added.

It was out of stock everywhere we track for all of September 2026, and today none of the 2 retailers we track has it in stock right now. Listed prices start at $779 at Brownells for when it comes back.

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Updated · from real builds on GunPartPicker · Prices checked · refreshed daily across 37 retailers

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