This is a dummy 13 fnaf endoskeleton that is compatible with @ccordero44 fnaf animatronic dummy 13s (the Freddy limbs in the pictures). I recommend printing in PETG.

Update*

I added legs to the model. I am not going to make arms as the dummy 13 arms are already too short to add the proper endo parts. Be aware that the model is a little taller than a regular dummy 13 because in order to make the legs accurate, they had to be taller. As of the moment I have no pictures of the new model but they are on the way. 

My next project will be a Funtime Freddy.