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Proof Research 100523: Up to 64% lighter than traditional steel barrels of similar contour. Improved heat dissipation for cooler and longer lasting barrels. Wrapped with high-strength, aerospace-grade carbon fiber impregnated with a proprietary matrix resin.
Caliber: 300 Blackout - Barrel Length: 12.5 - Twist: 7 - Gas System Length: Pistol - Gas Journal Dia.: .750 - Muzzle Thread: 5/8 x 24 - Weight: 1lbs-3oz