Machine guns are not the problem they account for 25% of all shootings. While 50% of them a pistol was used. The only way to stop most shootings is to remove gun ownership, and that will not happen. They can pry it from my cold dead hands if they want it. For explosives tannerite is a good explosive it only explodes when you shoot it. It's good for long rang target practice. You can buy 20 1/2 pound targets for $60 dollars. 30 pounds pounds of that stuff blows a car up easy.