This 18-inch AR match barrel chambered in 6.5 Creedmoor features a precision 1-8 twist rate and heavy Big Gunner contour for enhanced accuracy and heat dissipation.6.5 Creedmoor chamber for long-range precision18-inch barrel length with Big Gunner contour1-8 twist rate optimized for heavy bullets5/8-24 muzzle threads for suppressor/brake compatibilityRifle-length gas system for reliable cyclingBlack finish for durability and corrosion resistanceDesigned for precision shooting competitive applications and long-range hunting where accuracy and consistency are paramount. The heavy contour profile maintains barrel rigidity under sustained fire while the optimized twist rate stabilizes a wide range of 6.5 Creedmoor projectiles.