Rock River Arms 20in STD SS Barrel Post/No Threads

Rock River Arms 20 Inch Standard Heavy Stainless Steel .223 Wylde Barrel, Unthreaded, With Extension And Pin Specifications for Rock River Arms 20in STD SS Barrel Post/No Threads: Manufacturer: Rock River Arms Color: Steel Fabric/Material: 416R Stainless Steel Cartridge: .223 Wylde Caliber: .223 Caliber Barrel Length: 20 in Barrel Profile: Heavy Gas System Length: Mid Length Gas Block Journal Size-Diameter: .750 in Threads per Inch: Non Threaded Barrel Twist Rate: 1-8 Flutes: No Gun Make: Rock River Arms Gun Model: Universal Weight: 41 oz Package Contents: Rock River Arms 20in STD SS Barrel Post/No Threads