First, I DO NOT condone the show Doomsday Preppers showing "Mr. Wayne" building and using pipebombs on TV!! That gives preppers like us a bad name; not only with a parnoid government, but with people who don't understand us to begin with. NOW.............. One of my many intended defenses is blackpowder muzzleloading canons that I can build. Loaded with shot, chain, or nails they can really kick butt. And there is no federal offense in building, owning, and firing these types of canons. Any other thoughts?