Designed for steady, repeatable performance in varied environments, the Proof Research 134573 Bolt Action Barrel Pre-Fit 6mm Creedmoor 20" 1:7.50" Twist (5 Groove), 5/8"-24 tpi Threaded, Stainless Steel, Drop-In Design for Sig Cross emphasizes functional reliability and straightforward operation. This barrel is ideal for range training and recreational shooting, offering a seamless installation experience without the need for a gunsmith. Proof Research is renowned for its innovation and commitment to quality in firearm components.