Inspire to Make’s Igor used actual bullets to create the earphones you see above, and was kind enough to put together a step-by-step video showing how to make your own. Here’s what you need: 2 bullet shells S&W .40 Cal, a pair of old headphones, a 10mm wooden dowel, 400 Grit / 800 Grit sandpaper, a finishing sponge, hacksaw, battery-powered drill, drill bit (diameter of the drill bit should match the diameter of the wire), soldering iron, and a vice or a clamp to fix the bullet casing for drilling. Continue reading to watch.
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