Product DescriptionThe Rosco Manufacturing K9 Sauce Pack is a curated bundle of key components for an AR-15 upper receiver group build chambered in 5.56 NATO. Designed around matched, compatible parts, this kit helps streamline your build with a coordinated system intended to deliver reliable function right out of the box. The package includes essential components such as the barrel, bolt carrier group (BCG), gas block, and gas tube, selected to work together as a complete setup.Product Highlights Factory-matched "Sauce Pack" bundle built to simplify AR-15 upper receiver group component sourcing Includes key parts: barrel, bolt carrier group (BCG), gas block, and gas tube 16" 5.56 NATO stainless barrel with Black Nitride finish for durability and corrosion resistance 1:7" twist rate and 1/2"x28 muzzle thread pattern for broad compatibility Hand-picked components engineered to synchronize for dependable performanceSpecs Brand: Rosco Manufacturing Series: Sauce Pack Model: K9 Type: Upper receiver group components bundle (Sauce Pack + URG) Caliber: 5.56 NATO / 5.56x45mm NATO Barrel Length: 16" Twist Rate: 1:7" Thread Pattern: 1/2"x28 Barrel Material: Stainless Barrel Finish: Black Nitride Included Components (as listed): Barrel, BCG, gas block, gas tube UPC: 850039693373 Manufacturer Part Number: SP-K9-16-556-BCG-GTIDisclaimer: 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.