This high quality stainless steel AR-15 gas tube kit from CMMG includes a rifle length gas tube and a gas tube roll pin. Don't skimp on quality when it comes to such a vital part of your rifle's operating system, CMMG is known throughout the firearms industry as a premier manufacturer of AR-15 rifles and parts.Specifications and Features:Manufacturer Number: 55DA196Length: 15.125"Type: Gas TubeModel: RifleFinish: SilverSize: Rifle lengthMaterial: Stainless Steel