Quote Originally Posted by JBPuffin View Post
Considering the frailty of the mortal shell and the inclusion of HP as a mechanic to simulate your body being sundered, I don't think it's as ridiculous as you think to sunder an unarmed strike. Actually makes more sense than breaking a maul, for example.
I know what you mean, but the rules don't support this. As another example would be disarming (similar/same wording as sunder about what you target). You can't disarm unarmed strikes/natural attacks.
However you look at it, it doesn't work with the rules.