These are generally accurate drop-in barrels with finished chambers and do not normally call for any gunsmithing. In exceptional instances, the fitment may very well be necessary. In that case, you should see your local gunsmith for appropriate installation. Beretta ninety two Collection 3rd Gen. Prolonged Threaded Barrel 9mm available https://gunsandammunation.com/shop/beretta-typhoon-muzzle-brake-1-2x28-9mm/