These are not as primitive as Bill is looking for, but they are field expedient. Over time, I have picked up a couple galvanized steel timber spikes (150x5 mm) and aluminum gutter spikes (200x6 mm).
With a couple of these in your kit, I believe you can create several survival tools for defense and food gathering.
Has anyone tried to use these or similar items, for anything other than as intended??
Does anyone see a similarity to the current trend in Executive Battle Pens
or Kubotan sticks??
Field expedient means thinking outside the box..