The The Proof Research pre-fit carbon & steel barrel for Zermatt Arms TL3/SR3 Origin and RimX actions delivers a lightweight, durable upgrade for your rifle, featuring a 20-inch Sendero contour tailored to the Bighorn TL3 with 1-7 twist for ADS_22 ARC compatibility. This carbon fiber-wrapped barrel combines aerospace-grade materials with a proprietary resin matrix to deliver up to 64% less weight than traditional steel barrels of similar contour, while improving heat dissipation for cooler, longer lasting performance. Ready to install as a shouldered pre-fit, it threads on and requires only torque, a quick headspace check, and alignment to get you to the range; its designed specifically for the action type and length and is not interchangeable with other configurations. The result is unprecedented durability in demanding environments, maintaining rigidity under rapid fire and temperature swings while delivering consistent precision. Whether youre upgrading an existing rifle or switching calibers, this Proof Research barrel is engineered to enhance accuracy, reduce weight, and withstand extreme conditions, making it an ideal choice for serious hunters and long-range shooters using Zermatt Arms TL3/SR3 Origin and RimX platforms.