In a deadly force situation the only effective protection is obviously a firearm. THE ONLY WAY to stop a man with a gun is another man with a gun or woman. That said in a non deadly force situation my weapon of choice is currently the tazer it works quite well most of the time in my department I'm one of two that the tazer doesn' t work on it will stop my momentum but not put me down and I've been exposed to so much CS that I can fight or shoot right through it. Just meant as a cautionary tail. Not bragging my buddy says if your dumb you better be tough.