For riflemen, Tannerite is easy to buy in most states, and homemade recipes abound on YouTube. Attached to a nice tree stump and set off with your hunting rifle, it guarantees hootin’ and hollerin’. But be careful and know the law. It’s not allowed everywhere. Once mixed, this binary explosive becomes subject to a variety of state and federal regulations, and if you get carried away, you might get a visit from some stern-looking officers with badges.