This 338 ARC rifle barrel is precision-engineered for AR-15 platforms featuring an 11.5-inch barrel length with 1-5 twist rate optimized for heavy projectiles in the versatile 338 ARC cartridge.338 ARC caliber AR-15 compatible barrel11.5-inch barrel length with pistol gas system1-5 twist rate for optimal bullet stabilizationGunner profile contour (1.08 lbs weight)5/8-24 muzzle threads for suppressor/muzzle device compatibilityStainless steel construction with black finishPerfect for precision shooting and hunting applications this barrel delivers exceptional accuracy and performance in a compact configuration ideal for AR-15 builds requiring superior ballistic capabilities.