The Great Lakes GLFA Barrel AR15 M4 .223 Wylde is designed to accept both .223 Remington and 5.56 NATO cartridges. This 16-inch barrel features a 1:8 twist rate and is constructed from milspec CrMoV steel, providing durability and reliability. The barrel is finished in nitride for enhanced corrosion resistance and has a diameter of .750 inches for the gas block. It includes M4 feed ramps and is threaded with 1/2x28 threads.Key FeaturesCaliber: Compatible with .223 Remington and 5.56 NATO ammunition.Barrel Length: 16-inch length for a balanced shooting experience.Twist Rate: 1:8 twist rate for improved stabilization of a variety of bullet weights.Material: Constructed from milspec CrMoV steel for strength and durability.Finish: Nitride finish for enhanced corrosion resistance.