Welcome to the Beretta Xtrema Choke Tube Category. Midwest Gun Works offers a wide variety of Factory Beretta Choke Tubes for the Beretta owner. If you're looking for a Beretta 391 Xtrema or Xtrema 2 choke tube, then you've come to the right spot! Feel free to browse the products below and if you don't see the item you are looking for, keep checking back. We update our website daily and are continually expanding our extensive inventory.