Ballistic Advantage Premium Series Barrel .223 Wylde 14.5 inch SPR-Fluted Mid 1-8 Twist Stainless Steel. 223 Wylde chambered barrel is machined from 416R Stainless Steel with a bead blasted finish. Our Premium Series Barrels feature a Nickel Boron Coated Extended M4 Feed Ramp Extension. Featuring functionally aggressive flutes and crisp clean lines BA Fluted barrels deliver the perfect balance of weight and rigidity. Utilizing six and eight flute designs weve achieved weight reduction up to and exceeding 16 ounces. Confidently lighten your kit without sacrificing an ounce of accuracy. Specifications for Ballistic Advantage Premium Series .223 Wylde Barrel: Manufacturer: Ballistic Advantage Color: Stainless Steel Fabric/Material: 416R Stainless Steel Gas Block Journal Size-Diameter: .750 in Threads per Inch: 1/2x28 Barrel Twist Rate: 1-8 Barrel Material: 416R Stainless Steel Flutes: Yes Condition: New Country of Origin: USA Package Contents: Ballistic Advantage Premium Series .223 Wylde Barrel Ballistic Advantage Premium Series 223 Remington/5.56 NATO Barrel 14.5