Hello all. After some study I decided the Mossberg 835 was the shotgun for me and purchased a used one in what appears to be excellent condition for $150. It came with an extended, ported choke, but I can find NO identifying marks anywhere on the part. No notches, writing, nothing. I have a micrometer somewhere in the basement but thought perhaps someone here would recognize the item. According to my serial number on the shotgun/your serial number database, this gun is from 1999. Is it possible that this is a stock choke? I downloaded the manual for the 835 and it says that chokes are clearly marked and identified, but perhaps this wasn't always so? I can't imagine why any aftermarket manufacturer would make one without identifying marks which is why I have to wonder/hope that this is in fact the choke that originally came with the gun. Thanks! M.