Product Description The Rosco Manufacturing Sauce Pack bundle was created in response to customer demand for a ready-to-build set of key carbine/pistol components at a combined value. This kit is built around a Rosco Bloodline 12.5-inch 5.56 NATO barrel with a Melonite finish and includes a matching gas block, gas tube, and bolt carrier group (BCG) to help keep your upper running as a synchronized, uninterrupted system right out of the box. Product Highlights Complete Rosco "Sauce Pack" bundle with core components for an AR-15 style 5.56 build Rosco Bloodline 12.5" barrel chambered in 5.56 NATO for compact carbine/pistol setups Melonite barrel finish for durability and corrosion resistance Includes gas block, gas tube, and bolt carrier group (BCG) for a matched operating system Government profile barrel design for a balance of handling and performance Specs Brand: Rosco Manufacturing Product Type: Barrel bundle ("Sauce Pack") Line/Model: Bloodline Barrel Length: 12.5" Caliber: 5.56 NATO (5.56x45mm) Barrel Profile: Government Profile Finish: Melonite Color: Black Includes: Gas Block, Gas Tube, Bolt Carrier Group (BCG) Platform: AR-15 UPC: 181969500739 Manufacturer Part Number: SP-BL-125-556-BCG-GTC 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.