Rock River Arms 20in .308 CM Varmint Barrel Assembly w/Gas Block Black

Rock River Arms 20in .308 CM Varmint Barrel Assembly w/Gas Blk Black. 308 CM Varmint Non Threaded Barrel Assembly w/Gas Blk: Manufacturer: Rock River Arms Color: Black Caliber: 7.62x51mm NATO Barrel Length: 20 in Barrel Profile: Varmint Gas System Length: Rifle Length Gas Block Journal Size-Diameter: .936 in Barrel Twist Rate: 1-10 Flutes: No Gun Make: Rock River Arms Gun Model: Universal Weight: 55 oz Threads per Inch: Non Threaded Fabric/Material: Chrome Moly Package Contents: Rock River Arms 20in .308 CM Varmint Non Threaded Barrel Assembly w/Gas Blk What firearm models does the manufacturer say Rock River Arms 20in .308 CM Varmint Non Threaded Barrel Assembly w/Gas Blk is compatible with? The manufacturer says that Rock River Arms 20in .308 CM Varmint Non Threaded Barrel Assembly w/Gas Blk is compatible with UniversalRock River Arms 308A0236ASY: 20in .308 CM Varmint Barrel Assembly w/Gas Blk Black