Quote Originally Posted by Dynast-Kid View Post
And it also annoyed me how Auron always wore that stupid sling thing. Did they ever explain why he wore it (if so, I guess I wasn't paying attention to that parrt~).
It's part of the ronin style of wearing things, to symbolize the loss of a master. As for his arm that remains concealed, that is likely to be a war injury from confronting Yunalesca again. He takes it out when he's ready to bust nuts.

So, yes, they explained it, in the course right after JPN283. JPN331, I believe?