Board Thread:Episode Discussions/@comment-1181222-20170823100207/@comment-30323490-20170826170149

Nagato didn't randomly have chainsaws and cannon blast just because he had the Rinnegan Lol. He had to make his body like that similar to a puppeter shinobi, but unlike them, he has the Rinnegan (Asura Path) which makes his body easier to be modified.