Product Description The Timber Creek 556 Med 16 replacement barrel is a durable, performance-focused option for refreshing or upgrading an AR-15 build. Chambered in 5.56x45mm NATO and finished in protective black nitride, this 16-inch, medium-profile barrel is built to handle hard use while helping resist corrosion and wear. A mid-length gas system helps promote smooth cycling, and M4 feed ramps support reliable feeding. A thread protector is included, and installation requires a .750" gas block. Product Highlights 16" AR-15 replacement barrel chambered in 5.56x45mm NATO for versatile ammunition compatibility Black nitride finish enhances corrosion resistance and surface durability Mid-length gas system designed for balanced cycling and reduced felt recoil M4 feed ramps help support smooth, reliable feeding Includes thread protector; requires .750" gas block for installation Specs Brand: TIMBER CREEK OUTDOOR INC Manufacturer Part Number: TC556MED16 UPC: 816397025577 Caliber/Chamber: 5.56x45mm NATO Barrel Length: 16" Profile: Medium Gas System Length: Mid-length Feed Ramps: M4 Finish: Black Nitride Twist Rate: 1:7 Muzzle Thread: 1/2-28 Gas Block Journal: .750" (required) Approx. Weight: 2.1 lb Included: Thread protector 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.