Use these rules at all times.? Use them when you are teaching a class to beginners or experts.? Use these rules when you are learning at the range, in a CCW course, or in a Martial Arts course.? It does not matter what the gun is made out of; rubber, metal, or plastic.? It does not matter what it is used for; defensive training, theater/movie prop, shooting range, or empty hand defense.? Use these rules to make your training more effective and your classes powerful.