Proof Research 6mm ARC 16″ CF Barrel 1:7.5 Twist

The Proof Research 16″ carbon-fiber-wrapped barrel is an AR-style, precision-oriented barrel chambered for 6mm ARC. It starts from match-grade 416R stainless steel blanks that are turned to a reduced profile and wrapped with aerospace-grade carbon fiber to reduce weight and improve heat transport. The barrel uses a rifle-length gas system with a .750″ gas journal diameter and features 5/8-24 muzzle threads for common muzzle devices. This design suits lightweight AR builds and precision shooting applications where durability and thermal performance matter.

Key Specifications

• The barrel is chambered in 6mm ARC.
• The barrel length is 16 inches.
• The twist rate is 1:7.5.
• The gas system length is Rifle.
• The gas journal diameter is .750 inches.
• The muzzle threads are 5/8-24.
• The barrel blanks are made from 416R stainless steel.
• The external finish is a carbon fiber wrap.
• The contour is Medium.
• The barrel is threaded for accessory compatibility.

Engineered to blend match-grade steel with aerospace carbon-fiber construction, this barrel provides a lightweight platform with improved heat management for sustained accuracy. Its combination of a 1:7.5 twist, rifle gas system, and common 5/8-24 threading makes it a practical upgrade for precision-focused AR builds that prioritize balance, thermal stability, and reliable performance.