A nock gun is a special kind of gun that has multiple barrels attached to it. Think of it like a toy machine gun that shoots many foam darts at once, but instead of foam darts, it shoots real bullets! But don't worry, it's very dangerous and only trained people are allowed to use it. It's used in very specific situations where you need to shoot many things all at once, like if you were trying to stop a large group of enemies from attacking you. It's a special and powerful tool that is used carefully and with caution.