PROOF RESEARCH offers pre-fit carbon fiber barrels for Zermatt Arms TL3, SR3, Origin and RimX actions. Each shouldered barrel is machined for a precise fit and allows quick installation - simply thread into place, torque, confirm headspace and head to the range. Up to 64% lighter compared to traditional steel barrels with a similar contour Enhanced thermal resistance - optimized heat dissipation for cooler and more durable barrels The product exhibits exceptional durability, being encased in high-strength, aerospace-grade carbon fiber that is infused with a proprietary matrix resin Barrel twist rate - 1:8