Want a new caliber or a fresh barrel in your Tikka T3X? Don't worry, you won't have to make a special trip to the gunsmith to redo your rifle. Thanks to the unique system found in the International Barrels Pre-Fit Barrel system, barrel-swap jobs that used to be performed only by gunsmiths can now be done right in your workshop safely and easily! Each International Barrels Pre-Fit Tikka T3X precision barrel is constructed with a barrel-nut system that can be threaded onto your action right at home. Once the barrel is threaded into place, simply check its positioning with a set of headspace gauges and then tighten the barrel nut down to its proper torque settings. Then you're done! The easy attachment system of these International Barrels Pre-Fit Barrels isn't all you're getting. These gun barrels are button-rifled and are made to precision tolerances, double-checked at every step along the way. The barrels are made using the company's Medium contour, which features a straight taper from the breech to the muzzle. Each barrel is threaded with 5/8-24 TPI muzzle threads. The company warns that some stocks may need to be inlet to allow clearance for the barrel nut.