Proof Research Bolt Action Barrel Pre-Fit 20in 1:8 5 Groove 6.5 Creedmoor Carbon Fiber Drop-In Sig Cross

The Proof Research 134528 Bolt Action Barrel Pre-Fit 6.5 Creedmoor 20" 1:8 Twist (5 Groove), 5/8"-24 tpi Threaded, Carbon Fiber, Drop-In Design for Sig Cross delivers precision performance with a purpose-built design that combines elite materials and practical compatibility. This 20-inch bolt action barrel uses a 1:8 rifling twist and a 5 Groove bore, engineered to stabilize 6.5 Creedmoor ammunition for enhanced accuracy at extended ranges, while its carbon fiber finish reduces overall weight without sacrificing rigidity. The pre-fit, drop-in design is tailored for easy installation in Sig Cross platforms, enabling a streamlined workflow for builders and shooters who demand reliable, repeatable handling in the field or on the range. With 5/8"-24 threading, the barrel accommodates common muzzle devices and enables secure, clean installation in a broad selection of configurations. Proof Research combines advanced composite construction with precision machining to deliver a barrel that maintains heat resistance and stiffness under rapid-fire sessions, promoting consistent velocity and point-of-impact stability. For rifle enthusiasts seeking a high-performance upgrade that aligns with modern bolt-action builds, this pre-fit drop-in option pairs seamlessly with 6.5 Creedmoor loads and the Sig Cross chassis for shooters focused on accuracy, durability, and streamlined setup.