Rosco Manufacturing Purebred Sauce Pack 14.5in .223 Wylde Stainless. 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 available Bloodline accessories and all in-house made barrels will make for the ultimate combo in performance and cost savings. The Purebred sauce packs feature is hard-use barrels (from the namesake category) and the accessories needed to provide the consumer with a complete ignition system for their Duty/ Defense builds. Each Purebred Sauce Pack features a Purebred barrel Bloodline BCG (5.56/.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. Specifications for Rosco Manufacturing Purebred Sauce Pack: Manufacturer: Rosco Manufacturing Color: Stainless Finish: Bead Blast Fabric/Material: 416R Stainless Barrel Profile: Government Caliber: .223 Wylde Gas System Length: Mid Length Gun Make: AR Platform Gun Model: AR-15 Threads per Inch: 1/2x28 Barrel Twist Rate: 1-8 Hand: Ambidextrous Condition: New Gas Block Journal Size-Length: 1.297 in Country of Origin: USA Package Contents: Rosco Manufacturing Purebred Sauce Pack Purebred Barrel Bloodline BCG (5.56/.300 BLK) Bloodline Gas Block (Non-Adjustable) Bloodline Gas Tube What firearm models does the manufacturer say Rosco Manufacturing Purebred Sauce Pack is compatible with? The manufacturer says that Rosco Manufacturing Purebred Sauce Pack is compatible with AR-15Rosco Manufacturing SP-PB-145-223-BCG-GTM-NGB-001: Purebred Sauce Pack 14.5in .223 Wylde Stainless