Upgrade your Sig Cross 308 Win with the innovative Proof Research Carbon Fiber Pre-Fit Barrel. Featuring a user-friendly drop-in design this 16-inch bolt action barrel allows for at-home installation without the need for a gunsmith. With a precise 1:10 twist and a unique 5-groove bore type it ensures exceptional accuracy and performance. The sleek carbon fiber finish not only reduces weight but also enhances durability making it the ideal choice for those seeking reliability and precision in their shooting experience.