Stirfry

Hello Benelli owners, I got a really great deal on an almost new Benelli M2 from a local gun dealer, minus the chokes! My question is this; is my barrel a cryo treated barrel? The choice of chokes, wether or not they are Benelli or aftermarket is not as straight forward as I was hoping. Need help identifying which chokes I need to obtain for my gun. Thanks in advance! Confused in Tennessee