Product Description The Rosco Manufacturing K9 Sauce Pack is a precision-curated bundle designed to deliver everything needed for a high-performance AR-15 carbine or pistol build. Created in direct response to customer demand, this all-in-one kit combines hand-picked, purpose-matched components that work in seamless harmony right out of the box. The K9 Sauce Pack features a 12.5" K9 series barrel chambered in 5.56 NATO with a 1:7 twist rate, finished in a durable nitride black coating for outstanding corrosion resistance and long-term reliability. Paired with a Bloodline bolt carrier group, a patrol-length gas tube, and a non-adjustable Bloodline gas block, every component in this kit is engineered to optimize gas flow, ensure consistent ignition, and deliver smooth, reliable cycling for demanding duty and defense applications. Product Highlights Complete AR-15 Bundle: Includes K9 barrel, Bloodline bolt carrier group, patrol-length gas tube, and non-adjustable gas block for a ready-to-build kit. 12.5" K9 Barrel: Chambered in 5.56 NATO with a 1:7 twist rate and nitride black finish for outstanding durability and accuracy. Patrol-Length Gas System: Optimized gas tube and non-adjustable gas block work together to provide reliable, consistent cycling performance. Bloodline Bolt Carrier Group: Precision-manufactured BCG engineered to synchronize with the K9 barrel for peak system-level performance. Value-Packed Bundle: All components are hand-selected to integrate as a cohesive system, delivering professional-grade results at a competitive combined price. Specs Brand: Rosco Manufacturing Model: K9 Sauce Pack Caliber: 5.56 NATO Barrel Length: 12.5" Twist Rate: 1:7 Gas System: Patrol Length Finish: Nitride Black Color: Black Platform: AR-15 Kit Contents: K9 Barrel, Bloodline Bolt Carrier Group, Patrol-Length Gas Tube, Non-Adjustable Gas Block UPC: 850039693106 MPN: SP-K9-125-556-BCG-GTS 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.