These are generally correct drop-in barrels with completed chambers and do not commonly involve any gunsmithing. In uncommon instances, the fitment can be required. In that case, make sure you see your local gunsmith for suitable installation. Beretta ninety two Sequence third Gen. Prolonged Threaded Barrel 9mm available for sale. https://9mmmuzzlebrake12x2886429.blogdemls.com/26624507/the-ultimate-guide-to-beretta-cx4-storm-muzzle-brake