This precision-rifled cold hammer-forged tensioned barrel with a carbon fiber sleeve is lighter than conventional steel alloy barrels and the stainless-steel tensioned barrel is more rigid to reduce vibration. This 16.1" long barrel has a 1:16" RH twist, an overall diameter of .920" and weighs only 1.05 lbs. The barrel is threaded 1/2"-28 for the addition of muzzle devices and includes a thread cap. This Genuine Ruger Factory Accessory is made in the USA by Ruger Firearms.