You have to be 21, have money, pass a NCIC check.
That answer is true, IF you are purchasing a handgun from a licensed dealer. Most states allow person to person non dealer transfers as long as both people can legally own the gun, however a few states don't allow that so you have to go through a licencsed dealer.
To purchase a gun, no. Anyone can purchase a gun as long as they meet the age requirement, aren't a felon, and don't have any disqualifying misdemeanors.
Gun store.
18 for long guns; 21 for hand guns
Once can purchase a hand gun safe from a variety of different places. Some large gun stores sell hand gun safes. Stores specializing in security will also be able to help.
Hand gun - 21; long gun - 18
At a minium, 21 for a hand gun and 18 for a long gun.
21
No
You can't. Only a LEO or LEA can.
To purchase, 18 for long guns, 21 for hand guns. "owning" is a term that you will need to ger a lawyer's help with.
In the United States, yes.
18 for long gun, 21 for hand gun