Proof Research Pre-Fit Barrel AR-Type - 338 ARC - 14.5" Carbon Fiber Threaded Barrel

Proof Research Pre-Fit Barrel AR-Type - 338 ARC - 14.5" Carbon Fiber Threaded Barrel

Experience next‑level precision and reliability with the PROOF Research Pre‑Fit 14.5" Carbon Fiber Barrel for AR‑Type rifles in 338 ARC—engineered for shooters who demand uncompromising performance from their modern AR platform. Designed around PROOF’s advanced Caliber Matched Gas System (CAMGAS), this barrel delivers a perfectly tuned gas impulse that mirrors the pressure curves AR platforms were originally built for. The result is a shooting experience that feels smoother, cleaner, and more consistent, even with today’s high‑performance cartridges.

Crafted with aerospace‑grade carbon fiber and a proprietary resin matrix, this barrel offers extreme durability while cutting weight by up to 64% compared to traditional steel. Whether you're building a lightweight hunting rifle, a precision‑focused AR, or a duty‑ready platform, this barrel keeps you on target longer with reduced recoil, less fouling, and superior heat dissipation.

Carbon Fiber Construction
Aerospace‑grade carbon fiber wrap delivers exceptional strength while dramatically reducing weight for faster handling and improved balance.

Caliber Matched Gas System (CAMGAS)
Gas port placement is optimized for 338 ARC, ensuring smoother recoil, cleaner cycling, and enhanced reliability.

Enhanced Heat Dissipation
Carbon fiber and proprietary resin matrix improve thermal regulation, keeping the barrel cooler during extended firing sessions.

Reduced Recoil Impulse
Tuned gas system minimizes felt recoil, helping you stay on target and maintain faster follow‑up shots.

Extended Barrel Life
Lower operating temperatures and reduced fouling contribute to longer service life and more consistent performance.

Lightweight Performance
Up to 64% lighter than comparable steel barrels, making it ideal for mobile shooters and long days in the field.

Guaranteed Headspacing
Precision‑machined to match JP Enterprises Enhanced Bolt specifications for optimal fit and safety.

Specifications

• Caliber: 338 ARC
• Barrel Length: 14.5"
• Twist Rate: 1:8
• Gas System Length: Pistol
• Gas Journal Diameter: .750
• Gas Port Size: .093
• Muzzle Thread: 5/8‑24
• Construction: Carbon fiber–wrapped, aerospace‑grade materials with proprietary resin matrix
• Compatibility: Designed for AR‑type platforms using full‑mass components
• Headspacing: Guaranteed to JP Enterprises Enhanced Bolt specifications