If you are planning to buy a handgun I suggest you to read the laws in your state, a lot of people get themselves in trouble just because they don't know. Now, after reading the laws, I also suggest to take a firearm safety class. After that, the best way to get a handgun before 21 is to ask your parent to buy it for you. In Alaska gun ownership is legal for any person older than 18 and no permit or registration is required. Be careful, even though Alaska doesn't require a permit to conceal carry it is unlawful for people under 21 to do so.