Beretta has manufactured barrels with several different thread/choke styles over the years. Some guidelines to help you determine which type of choke tubes are right for your gun are as follows:
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Please note that Muller Chokes is NOT responsible to know what choke type your barrel takes. It is important, if you have purchased a used gun, for you to know whether or not any after-market adjustments have been made to your gun. If you have questions, an experienced gunsmith can advise you.