lower the age limit of everything to the age at which you are eligible to serve, 18.

At 18 one is considered mature enough to go to war for this country. However, the law states, you are not mature enough to own a pistol, drink a alcoholic beverage, concealed carry, or rent a car. If one can be sent to war then they can handle these responsibilities. Lower these age limits to 18 to grant those who are of age these rights.