Daniel Defense AR-15 Barrel Features This Daniel Defense barrel is chambered in .300 AAC Blackout with a 10.3 inch length a 1:8 inch twist rate and a pistol-length gas system giving builders a compact reliable option for a short-barreled AR pistol build. The S2W profile balances strength and weight keeping the barrel durable under sustained fire while avoiding unnecessary bulk on the muzzle end. Cold hammer forging shapes the barrel around a mandrel using carbide steel hammers under intense hydraulic pressure producing the lands grooves and chamber all in one precise process. This method has been proven for decades to yield some of the most accurate longest-lasting rifle barrels available. Because the forging process creates a defect-free bore and highly consistent chamber this barrel delivers more consistent accuracy than barrels made with cut or button rifling. Every Daniel Defense cold hammer forged barrel is manufactured entirely at their state-of-the-art facility in Black Creek Georgia reflecting a manufacturing philosophy built on not cutting corners. The barrel features a forged chamber and a premium exterior coating for corrosion resistance and long service life. For builders assembling a reliable .300 Blackout AR pistol or short rifle this Daniel Defense barrel brings genuine factory-grade accuracy and durability to the build. Daniel Defense AR-15 Barrel Specifications Manufacturer: Daniel Defense Model: AR-15 Barrel Caliber: .300 AAC Blackout Barrel Length: 10.3 Twist Rate: 1:8 Color: Black Gas System Length: Pistol Length Available At: GrabAGun