User blog comment:Staw-Hat Luffy/How strong is Z?/@comment-2046973-20121211164653

I have a theory that, because of the nature of Z's mechanical arm and the pic where we saw the Dyna Stone, that Z will put the stone inside of his arm to be able to fire those explosions he fired at Kizaru.

That's what I think.

So Z + Dyna Stone = Slightly above Admiral level.

EDIT; Also, I think, because of all the holes in Z's arm, that it originally functions as a gatling gun (and hammer arm, obviously).