These are generally real fall-in barrels with concluded chambers and don't usually involve any gunsmithing. In rare instances, the fitment may very well be needed. In that situation, you should see your neighborhood gunsmith for proper set up. Beretta 92 Sequence 3rd Gen. Extended Threaded Barrel 9mm for sale. Made https://gunsandammunation.com/shop/beretta-typhoon-muzzle-brake-1-2x28-9mm/