There are licenses and licenses. You can get a firearms owner's ID that will permit you to purchase and possess a rifle, shotgun or bb/ pellet gun at 18. A handgun permit is 21. A permit to CARRY a concealed handgun is 21.
If you have a permit to carry.
Not legally. Florida requires a permit to carry a gun on your person in public.
No, not in public. You can carry a gun in your vehicle in Mississippi, but not in public without a permit.
You can carry a gun in Florida. A Florida gun carry permit has restrictions as well as reciprocation with certain other states. See discussion page for more details.
You can't carry a gun in Georgia without a permit.
You need a Firearm Purchaser's ID card- a form of permit. NJ has a LOT of gun laws.
No.
You can keep your gun with you in Minnesota if you have a permit to carry.
No, you only need a permit if you want to carry the gun in public.
Iowa Law requires that an individual have a permit to carry handguns. This permit is necessary for both open and concealed carry.
You can carry a handgun openly without a permit, except in your vehicle. To carry a gun in your vehicle, or to carry a gun concealed, you must have a NH permit or a permit that is recognized by the state of NH. For more information, see opencary.org, or handgunlaw.us