Designed for steady, repeatable performance in varied environments, the Proof Research 138946 Bolt Action Barrel Pre-Fit 260 Rem 18" 1:8" Twist (5 Groove), 5/8"-24 tpi Threaded, Carbon Fiber, Drop-In Design for Sig Cross emphasizes functional reliability and straightforward operation. This barrel is perfect for range training and recreational shooting, offering a seamless drop-in design that eliminates the need for a gunsmith. Proof Research is renowned for its innovative approach to firearm components, ensuring top-notch quality and performance.