Product Description The Rosco Manufacturing Bloodline Sauce Pack is a purpose-built bundle designed to simplify your AR-15 pistol or carbine build with matched core components that work together right out of the box. Centered around an 11.5-inch 5.56 NATO Bloodline barrel with a durable Melonite/Nitride-style finish, this kit includes a non-adjustable gas block, gas tube, and bolt carrier group (BCG) to help deliver a reliable, uninterrupted operating system. It&';s an ideal choice for builders who want proven parts in one package for consistent performance and long-term durability. Product Highlights All-in-one Rosco "Sauce Pack" bundle for streamlined AR-15 builds 11.5" Bloodline 5.56 NATO barrel for compact, maneuverable setups Includes bolt carrier group (BCG), non-adjustable gas block, and gas tube Government/M4-style barrel profile with 1:7 twist for versatile 5.56 loads Carbine-length gas system and 1/2x28 muzzle threads for broad compatibility Specs Brand: Rosco Manufacturing Model: Bloodline Type: Barrel bundle / "Sauce Pack" kit Caliber: 5.56 NATO Barrel Length: 11.5" Barrel Profile: Government / M4 Barrel Material: 4150 CMV Twist Rate: 1:7 Finish: Melonite / Nitride (listed by seller sources) Gas System Length: Carbine Gas Block Size: 0.750 Muzzle Thread Pitch: 1/2x28 Included Components: Barrel, Bolt Carrier Group (BCG), Non-Adjustable Gas Block, Gas Tube UPC: 181969500722 Manufacturer Part Number: SP-BL-115-556-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.