Bullets don't kill people

Ever since the gun was invented to scare off the dinosaurs humans have been using the gun to "Kill" each other. Everyone thinks that a projectile that leaves the gun (the bullet) kills people. But that is false. Our top Scientographers at ScienceFactz™ LLC have discovered that the sound of hearing a gun fired kills someone.
When we first tested this theory we went to an old folks home with AR-15's and started firing the our guns everywhere. To our amazement no one died except for one of the nurses who happened to be in the same room at the time. This is do to the fact that old people cannot hear very well so when the gun was fired, they didn't hear it and didn't die.