How hard would it be to make guns/gunpowder? If you were in a plane crash, and the plane was left somewhat intact, could you use the scrap of the plane to make a simple gun, like a flintlock musket for hunting? I believe the plane would have metal tubes(as support beams or something) which could be used as a barrel for a gun. The flint striking mechanism could be from a dead lighter or something... And gunpowder (saltpetre) can be made from fermenting manure. The saltpetre is mixed with ground up charcoal, and sulfur, but sulfur is optional... How hard would it be to do this?