PROOF Research PR15 6mm ARC 20″ Barrel 7.5 Twist PXT Carbon Fiber

Elevate your AR-15 platform with the PROOF Research PR15 6mm ARC 20″ Barrel featuring a 7.5″ twist rate and PXT (Polished eXtended Throat) carbon fiber wrapped construction. PROOF Research is renowned for producing some of the most accurate and lightweight barrels in the industry, and this PR15 barrel delivers exactly that — exceptional precision, reduced weight, and outstanding durability built for serious shooters.

The 6mm ARC (Advanced Rifle Cartridge) chambering offers a significant ballistic advantage over traditional AR-15 cartridges, making this barrel an ideal choice for long-range precision shooting, hunting, and competition. The 7.5 twist rate is optimized to stabilize a wide range of 6mm ARC projectiles, ensuring consistent accuracy at extended distances. The 20″ barrel length maximizes velocity potential from the 6mm ARC cartridge, giving you every advantage downrange.

PROOF Research’s patented carbon fiber wrapped barrel technology delivers a barrel that is dramatically lighter than a comparable steel barrel while maintaining superior stiffness and heat dissipation — critical factors for maintaining accuracy during extended shooting sessions. The PXT profile features a polished extended throat designed to enhance cartridge seating and accuracy potential.

Whether you’re building a precision long-range rifle, a dedicated hunting platform, or a serious competition build, the PROOF Research PR15 6mm ARC 20″ PXT barrel is a premium upgrade that delivers measurable results.

At Deep Roots Rifle Co, we stock hard-to-find premium barrel components like this PROOF Research PR15 and offer expert guidance to help you complete your build. Order online for fast shipping nationwide, or visit our gun shop in Eustis, Florida to speak with our knowledgeable staff about your custom build needs.