Product Description The Rosco Manufacturing K9 Sauce Pack is a purpose-built bundle of key AR-15 build components selected to run reliably together right out of the box. Built around a hard-use 13.95-inch K9 barrel chambered in 5.56 NATO/5.56x45mm, this kit pairs the barrel with a matching bolt carrier group, a non-adjustable gas block, and a mid-length gas tube to help create a smooth, uninterrupted operating system for duty, defense, and performance-focused builds. Product Highlights Complete "Sauce Pack" kit includes barrel, bolt carrier group (BCG), non-adjustable gas block, and mid-length gas tube 13.95-inch Rosco K9 barrel chambered in 5.56 NATO / 5.56x45mm for AR-15 platform builds Mid-length gas system components selected to work together for consistent cycling and reliability Nitride finish and black colorway for durability and corrosion resistance (as listed by distributors) Bundled to deliver strong performance and value for carbine/pistol build projects Specs Brand: Rosco Manufacturing Manufacturer Part Number: SP-K9-1395-556-BCG-GTM UPC: 850039693151 Platform Fit: AR-15 Caliber: 5.56 NATO / 5.56x45mm Barrel Length: 13.95 in Gas System Length: Mid-length Finish: Nitride Color: Black Included Components: K9 barrel, bolt carrier group, non-adjustable gas block, mid-length gas tube 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.