They're true fall-in barrels with completed chambers and don't usually call for any gunsmithing. In unusual instances, the fitment may very well be essential. In that case, you should see your neighborhood gunsmith for suitable installation. Beretta 92 Sequence 3rd Gen. Prolonged Threaded Barrel 9mm available for sale. This muzzle https://gunsandammunation.com/shop/beretta-typhoon-muzzle-brake-1-2x28-9mm/