Product Description Upgrade or complete your AR-15 build with the Daniel Defense DD Barrel, a 14.5-inch 5.56x45mm NATO mid-length barrel engineered for reliable performance and consistent accuracy. Built from 4150 chrome moly vanadium steel and finished in black phosphate, this lightweight-profile barrel is cold hammer forged using intense hydraulic pressure and a bore mandrel to form the chamber, lands, and grooves. The result is a highly consistent, defect-free bore and uniform chamber dimensions designed to deliver dependable function and long service life. Product Highlights Cold hammer forged (CHF) construction for a consistent chamber and defect-free bore 14.5" mid-length gas system barrel designed for AR-15 platforms in 5.56x45mm NATO Lightweight profile helps reduce front-end weight for faster handling Durable 4150 chrome moly vanadium steel with a black phosphate finish 1:7" twist rate and 1/2"x28 muzzle threads for common 5.56 loads and devices Specs Brand: Daniel Defense Model: DD Barrel MPN: 0707719125018 UPC: 852548002448 Caliber: 5.56x45mm NATO Barrel Length: 14.50 in Gas System Length: Mid-length Profile: Lightweight Twist Rate: 1:7 Muzzle Threads: 1/2"x28 Material: 4150 Chrome Moly Vanadium Steel Finish: Black Phosphate Firearm Fit: AR-15 Weight: 1.38 lb 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 products manufacturer.