Rosco Manufacturing Bloodline Sauce Pack 12.5in 5.56mm Black. Add additional accessories to enhance your sauce pack. Specifications for Rosco Manufacturing Saucepack Bloodline AR-15 5.56mm Threaded Rifle Barrel: Manufacturer: Rosco Manufacturing Color: Black Finish: Nitride Fabric/Material: 4150 CMV Caliber: 5.56mm Barrel Profile: Government Gun Make: AR Platform Gun Model: AR-15 Barrel Twist Rate: 1-7 Hand: Ambidextrous Weight: 4 lb Condition: New Gas Block Journal Size-Length: 1.297 in Gun Type: Rifle Firearms Threads Per Inch: 1/2x28 Package Contents: Rosco Manufacturing Saucepack Bloodline AR-15 5.56mm Threaded Rifle Barrel What firearm models does the manufacturer say Rosco Manufacturing Saucepack Bloodline AR-15 5.56mm Threaded Rifle Barrel is compatible with? The manufacturer says that Rosco Manufacturing Saucepack Bloodline AR-15 5.56mm Threaded Rifle Barrel is compatible with AR-15Rosco Manufacturing SP-BL-125-556-BCG-GTC-NGB-001: Bloodline Sauce Pack 12.5in 5.56mm Black