> 590’s have been available to the public for 2 decades I dont know how old this pres release is! I have seen A1 models (thicker barrel for the navy) for sale several years ago.
Question? Why would the Navy model have a thicker barrel?
Thicker barrel makes a better club when you run out of ammo.
I think it was in case there was water in the barrel it wont explode when you shoot it. I compared one side by side to a 590 and it was pretty much the same shotgun.