The Tacfire BAR55615-5BN Black 5.56 NATO barrel redefines high-performance standards for your AR platform. Constructed with top-tier 4150 chrome moly steel and a durable nitride finish, this compact 5" barrel guarantees reliability and precision in diverse shooting scenarios. Caliber: 5.56 NATO Twist Rate: 1:5 Length: 5 inches Material: 4150 Chrome Moly Steel Finish: Nitride Elevate your shooting experience with the Tacfire BAR55615-5BN, delivering unmatched accuracy and tactical adaptability.