I was wondering how old you have to be to carry a gun. I am only 18 and know I cant own one, but I was wondering how old you have to be to carry one with a permit. I am asking because earlier like 4-5 boys in some mini van were following me and my GF for 20 minutes. I know they were following me because they went up and down every aisle I did and I even drove in circles around parked cars and they followed right behind. So I drove like 80 on the main highway(45 mph speed limit) trying to attract a cop or something because my cell phone doesn't work. They eventually left, but I would have felt more secure with a firearm of some sort.