I am guessing this is a bug.
Today I decided to check out what kind of things I would get out of the Ranger box. I am fine with getting stuff I don’t want to use. That’s the gamble of it. But imagine my surprise to find Berserker’s rifle of Water, an item rangers cant use. I was mildly annoyed.
I sent an ingame bug report but figured I would post here too as a warning to others.