Rock River Arms 16in R4 CM LTWT Barrel Assembly Black. . Established working with several of the most extremely sturdy and dependable components in existence these AR15 Barrels by Rock River Arms offers you a product that will give years of reliability. Rock River Arms has been generating top quality merchandise for a very long time and the Rock River Arms 16in R4 CM LTWT Barrel Assembly is their means of revealing just how much they are concerned. Here at OpticsPlanet we ensure that it is our obligation to purchase the best product for all your needs and presenting the Rock River Arms 16in R4 CM LTWT Barrel Assembly is one thing that we're pleased to offer. Specifications for Rock River Arms 16in R4 CM LTWT Barrel Assembly: Manufacturer: Rock River Arms Color: Black Fabric/Material: 416R Stainless Steel Caliber: 5.56x45mm NATO Barrel Length: 16 in Barrel Profile: R-4 Gas System Length: Carbine Length Gas Block Journal Size-Diameter: .750 in Threads per Inch: 1/2x28 Barrel Twist Rate: 1-9 Flutes: No Gun Make: Rock River Arms Gun Model: Universal Weight: 35 oz Package Contents: Rock River Arms 16in R4 CM LTWT Barrel Assembly What firearm models does the manufacturer say Rock River Arms 16in R4 CM LTWT Barrel Assembly is compatible with? The manufacturer says that Rock River Arms 16in R4 CM LTWT Barrel Assembly is compatible with UniversalRock River Arms AR0205ASY: 16in R4 CM LTWT Barrel Assembly Black