The Tiger Rock Inc. BR308-20P AR-10/LR-308 rifle barrel offers unparalleled precision and performance for discerning shooters. Crafted from top-quality 4150 gun steel, this barrel is engineered for durability and accuracy. Its 20" length and 1:10 twist rate guarantee optimal bullet stabilization, making it a standout choice for serious firearm enthusiasts. Length: 20" 1:10 Twist .750" gas block diameter Rifle Length with a 0.125" gas hole diameter 5/8"x24 Thread Pitch 4150 gun quality steel, heat treated to RC 28-32 hardness, stress relieved Parkrized finish Light Contour Match Grade Made in the U.S.A. Fits: AR-10 DPMS Compatible Select the Tiger Rock BR308-20P for unrivaled reliability and performance on every outing.