Hello monteneerin,

Thank you for the reply. (thank you to others as well)

Yes, the Ferlach barrels are "sleeved" into the original block. You can barely see a thin line around the face of both chambers, but it is there. You can also see a thin line at the outside just ahead of the chambers, like mon-o-block construction.

Is there any source (book) that shows the different "grades" of Greener shotguns? Do you think an email to the factory would gain any information?

How to Hunt Wisconsin Whitetail Deer with a Cannon