Thanks to demand and the busy slave labor benches in China most people would never imagine making a mini fire piston from machined metal. The truth that with a few machines you could probably create 90% of your survival kit yourself. When you talk about true preparedness you want to be able to create things like knives and tools or at least maintain them. This fire piston will take the ability to machine metal.
Even if you don’t have the ability to machine metal this article may change your mind about what you store in your garage. When you see how quickly and easily this survival tool can be made I have a feeling it will change your tune on metal work. This level of metal work would change your level of preparedness, undoubtedly. Are you doing any metal work currently?