The PROOF Research pre-fit carbon & steel barrel for Zermatt Arms TL3/SR3 Origin and RimX actions delivers a lightweight, high-durability upgrade that makes caliber changes and rifle refinement straightforward: simply thread on the 18'' Sendero Contour barrel chambered in 22 ARC, torque to spec, and double-check headspace before heading to the range. This shouldered barrel is designed for easy installation and reliable alignment with your action, providing a seamless path to enhanced accuracy and performance, whether youre dialing in for long-range sessions or rugged field use. The lightweight construction delivers up to 64% weight reduction compared to traditional steel barrels of similar contour, while the extreme temperature resistance and improved heat dissipation help maintain cooler barrels and longer stringing life under demanding conditions. Wrapped in aerospace-grade carbon fiber impregnated with a proprietary resin, it offers unprecedented durability for challenging environments and repeated engagements. DISCLAIMER: All shouldered pre-fit barrels are guaranteed for headspacing; due to variance in actions we do not guarantee the timing and alignment of the barrel engraving to your stock line; barrels are specific to the action type/length and are not interchangeable.