At 18, you can own and have a handgun in your possesion. Just can't buy it from an FFL or buy ammo for it either. Dumbest thing I have ever heard. You can join the military and be given a service weapon, but you cannot purchase your own. Dumb, dumb, dumb.At 19, you'd be shooting with adulys as you could be in or served in the military.
Have to double check but understanding is that you can have a handgun, especially at a shooting event, at 19. Just cannot buy a handgun or handgun ammo or have a concealed carry license at that age. There are groups working to change that because if you can be in the military, you should be able to have a handgun.