The Guppy is one heck of a weapon; as it has a hammer like head; much like the Defender 1. So, when you “strike” someone with this tool it issues a lot of pain and damage. Yet, doesn’t like like a weapon at all. If you are stopped and they look at it, which has happened to me, they don’t even think it’s a weapon.
You should be able to take a Guppy anywhere with you. Or if you fly you can check your defenders in your check on luggage. No one has had an issue flying with a defender either; however, if that makes you feel uncomfortable then just put them in your check on luggage.
Now you can equip your self, a friend, fellow traveler or loved one with this special!