Product Description The Seekins Precision 18" .223 Wylde Match Grade Barrel is precision CNC machined to match-grade specifications from premium 416 stainless steel blanks. Every barrel undergoes no fewer than four rigorous quality inspections to guarantee maximum accuracy and reliability, making it a worthy upgrade for any tactical or competition AR-15 rifle. The .223 Wylde chamber delivers the precision of .223 Remington while also safely and reliably handling higher-pressure 5.56mm NATO ammunition. Finished with a non-glare bead blast treatment and a durable Armor Black coating, the barrel features 5R button rifling with a 1:8 twist rate and is threaded 1/2-28 for a wide range of compatible muzzle devices. A purpose-built gas block alignment dimple enables fast and straightforward installation of any .750" gas block, and the mil-spec design makes this barrel a true drop-in replacement for any standard AR-15 platform. Product Highlights Precision CNC machined from premium 416 stainless steel blanks and inspected four times for guaranteed concentricity and alignment .223 Wylde chamber combines .223 Remington accuracy with safe, reliable compatibility with 5.56mm NATO ammunition 5R button rifling with a 1:8 twist rate delivers outstanding stabilization and long-range accuracy potential Armor Black coating over a non-glare bead blast finish provides superior corrosion and wear resistance Unique gas block alignment dimple simplifies installation of any .750" gas block; designed as a direct mil-spec drop-in replacement Specs Brand: Seekins Precision Caliber / Chamber: .223 Wylde Barrel Length: 18" Material: 416 Stainless Steel Rifling: 5R Button Rifling Twist Rate: 1:8 Thread Pitch: 1/2-28 Finish: Armor Black Coated (Bead Blast) Gas Block Seat Diameter: .750" Compatible Platform: AR-15 / Mil-Spec UPC: 811452021204 MPN: 10120021 Disclaimer: We strive to provide accurate and up-to-date product descriptions, specifications, and images; however, errors or omissions may occasionally occur. We are not responsible for any inaccuracies or discrepancies in the content provided. If you notice anything incorrect or unclear, please contact us so we can correct it. When in doubt, we recommend verifying details directly with the product&';s manufacturer.