Funny that you mention the fire piston. I havn't ever tried one but they sure look effective, and fun too. I have been trying to make one off and on for quite some time not but have not been successful yet. It's hard to get a both pieces and the gasket fit just right with all natural materials. I imagine that after this weekend I will have quite a supply of both deer and turkey bones though so maybe I'll try again in the next couple weeks. I have seen a couple for sale in various places that were made from anything from bone to plexiglass but I just can't seem to get myself to buy one. Would rather keep trying to make one. I imagine I will succeed eventually. It took me forever to make fire with a hand drill but I finally did it. Just recently actually.