This Ruger 10/22 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 bull 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 protector. NOTE: Customers must have a 10/22 stock capable of accommodating a bull barrel to use this barrel on their rifles. Cannot be installed on 10/22 Takedown models.