Product DescriptionThe Daniel Defense 16-inch 5.56 NATO Government Profile mid-length barrel assembly is a premium AR-15 replacement barrel built for durability, reliable cycling, and consistent accuracy. It features a 1:7 twist rate suited for a wide range of 5.56 projectiles and includes a factory-installed low-profile gas block (LPG) for a streamlined setup under free-float handguards. Made from 4150 chrome moly vanadium steel and cold-hammer forged for long service life, this barrel is chrome lined and finished with a mil-spec heavy phosphate exterior coating for enhanced corrosion and wear resistance.Product Highlights 16-inch Government profile 5.56 NATO barrel for a balanced blend of handling and performance Mid-length gas system with included low-profile gas block for smoother cycling and reduced recoil impulse Cold-hammer forged 4150 Chrome Moly Vanadium steel construction for extended barrel life Chrome-lined bore with mil-spec heavy phosphate exterior finish for durability and corrosion resistance 1:7 twist rate designed to stabilize many modern 5.56 NATO projectile weightsSpecs Brand: Daniel Defense Manufacturer Part Number: 07-077-06158 UPC: 815604011945 Caliber: 5.56 NATO (5.56x45mm) Barrel Length: 16 in Profile/Contour: Government Gas System Length: Mid-Length Gas Block Included: Low-profile gas block (LPG) Twist Rate: 1:7 Material: 4150 Chrome Moly Vanadium steel (CMV) Manufacturing Process: Cold-hammer forged (CHF) Bore: Chrome lined Exterior Finish: Mil-spec heavy phosphate (black) Muzzle Threads: 1/2"-28 Gas Block Journal Diameter: 0.750 in Country of Origin: United States of AmericaDisclaimer: 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.