Proof Research Bolt Action Pre Fit 308 Win 16in 1 10 Twist Carbon Fiber Drop In Sig Cross

The Proof Research 134467 Bolt Action Barrel Pre-Fit 308 Win 16" 1:10" Twist (5 Groove) with 5/8"-24 tpi threaded carbon fiber delivers precision and performance for the Sig Cross platform, offering a drop-in design that simplifies installation and ensures consistent, handgun-friendly handling. Built around a 16" barrel length and a 1:10" twist to stabilize a wide range of 308 Win projectiles, this pre-fit barrel features a 5 Groove bore for optimal internal accuracy and velocity consistency, while the carbon fiber finish provides a lightweight, rigid profile that enhances heat dissipation and reduces total rifle weight without sacrificing strength. The drop-in construction minimizes fitting work, enabling quick assembly and reliable shot-to-shot repeatability in tactical or elk-hunting scenarios alike. Whether you're chasing tight groupings at the range or long-range field performance, this Proof Research barrel leverages advanced materials and engineering to maximize rigidity, reduce harmonics, and improve point-of-impact stability. Ideal for shooters seeking a high-precision upgrade for their Sig Cross, this bolt action barrel blends durability, modularity, and competitive accuracy into a single, streamlined upgrade.