Ballistic Advantage Premium Barrel AR-15 .223 Wylde 18in SPR Contour 1/8 Twist 1/2x28 Thread QPQ Corrosion Resistant Black. 223 Wylde chambered barrel is machined from 416R Stainless Steel with a bead blasted finish. Ballistic Advantage Premium Series Barrels feature a Nickel Boron Coated Extended M4 Feed Ramp Extension. Specifications for Ballistic Advantage Premium .223 Wylde Barrel: Manufacturer: Ballistic Advantage Fabric/Material: 416R Stainless Steel Caliber: 5.56x45mm NATO .223 Wylde Gas Block Journal Size-Diameter: .750 in Threads per Inch: 1/2x28 Barrel Twist Rate: 1-8 Barrel Material: 416R Stainless Steel Gun Make: AR Platform Gun Model: AR-15 Additional Features: HP and MPI Tested Included Accessories: Standard Condition: New Country of Origin: USA Package Contents: Ballistic Advantage Premium .223 Wylde Barrel The Ballistic Advantage Premium .223 Wylde Barrel is a quality addition to the Ballistic Advantage lineup. For more great deals on AR15 Barrels by Ballistic Advantage please browse our Ballistic Advantage Gun Parts page. What firearm models does the manufacturer say Ballistic Advantage Premium .223 Wylde Barrel is compatible with? The manufacturer suggests that Ballistic Advantage Premium .223 Wylde Barrel is compatible with AR-15Ballistic Advantage BABL223021PQ: Premium Barrel AR-15 .223 Wylde 18in SPR Contour 1/8 Twist 1/2x28 Thread QPQ Corrosion Resistant Black