The Tiger Rock BR167P-B300 AR-300BLK/300AAC 16" Rifle Barrel exemplifies outstanding quality and performance for avid marksmen. Engineered from high-grade 4140 gun steel, this barrel delivers remarkable durability and a heat-treated hardness that guarantees consistent reliability in all conditions. 16" length optimized for AR-15 platform 1:7 twist rate for enhanced stability and accuracy Parkerized finish for superior corrosion resistance .750" gas block diameter for smooth cycling Compatible with .300 BLK (AAC Blackout) ammunition 5/8"x24 thread pitch for various muzzle devices Proudly manufactured in the USA, the Tiger Rock BR167P-B300 delivers unmatched performance for your shooting endeavors.