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Proof Research 121665: 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: 6.5 Grendel - Type: PR15 - Barrel Length: 18 - Twist Rate: 8 - Gas System Length: Rifle - Gas Journal Diameter: .750 - Thread: 5/8-24 - Weight: 1lbs-13oz