The Rosco ?Sauce Pack? bundles were created after direct requests from our customers to provide them with the key components needed for their carbine or pistol builds at a great combined price. The result is a hand-picked list of parts that will produce results right out of the box. All parts within these kits are designed to synchronize together and create an un-interrupted system that will bring every individual component to its peak performance level. The perfect marriage of all Rosco's available Bloodline accessories and their in-house made barrels will make for the ultimate combo in performance and cost savings. Rosco's Bloodline sauce packs feature their hard-use barrels (from the namesake category) and the accessories needed to provide the consumer with a complete ignition system for their Duty or Defense builds. Each Bloodline ?Sauce Pack? features a Bloodline barrel, Bloodline BCG (5.56 or .300 BLK), Bloodline Gas Block (Non-Adjustable), and a Bloodline Gas Tube (Pistol, Carbine, Mid-Length, or Rifle). The parts are all designed to work perfectly when paired together and are designed to maximize the performance of each component, collectively! Bloodline ?Sauce Packs? include the following: Bloodline Barrel, Bloodline BCG (5.56 or .300 BLK), Bloodline Gas Block (Non-Adjustable), and Bloodline Gas Tube. Barrel Length: 11.5 inches Barrel Material: 4150 CMV Barrel Caliber: 5.57 Government profile Twist Rate: 1 to 7 Gas Block Size: .750 Barrel Thread: 1/2 x 28; Gas System Length: Carbine