Can any 1 buy a gun legally in the US?

no, there are background checks that must be followed, plus you have to be 21 to buy a handgun. That's not to say criminals cant get their hands on guns by other than legal means, but hey, that's why they are called criminals.

Also, anyone convicted of domestic violence, certain other crimes, mentally deficient people, and others are prohibited from legally buying guns.
Most definitely.
A cop or if you have a liscence to have a gun. Hope I Helped!
You bet, and anyone who tries to interfere with that right should be arrested for violating the Constitution.
Almost anyone. Felons maynot. The insane may not. Anti-gun Liberals do but pretend not to.
It all depends. You have to be a U.S. Citizen... not an illegal ALIEN... you have to be over 18 and you can't have a felony conviction on your record.


Answer:
As long as they are over 18, have no felonies, and are not adjudicated mentally defective, have no outstanding restraining orders or a history of domestic violence, are a U.S. citizen... then yes, no problem.
Yes, of course, I own several and have a Carry and conceal permit to carry, I live in Texas
I agree with boom.
no if your convicted of a felony you cant buy a gun also if you are underage you cant buy a gun but they are easy to get off the street but if you are caught caring one you can be arrested
In most states, anyone can buy a rifle or shotgun without a waiting period or background check, beyond taking your driver's license info down.

That is NOT true of handguns or semi-automatics.
Not anyone, If your a criminal you cannot.
No. There are many restrictions on who may legally purchase a firearm. You have to be a citizen, you can't be a felon or ex-felon, you can't be insane. You can't have been convicted of a domestic violence crime or be a fugitive. There may be few other restrictions that I can't think of right now.
No you cant just walk into a store and buy a gun you half to go through background checks and other things before they will actually hand a gun over to you and with certain guns you will need to take a class on gun safety and other things as well their are more things to do then just hand over some cash and walk out with a gun here in the US unless you get a dirty gun off the street from someone then yes you can as their are more illegal guns on the street being passed around then their are legal guns being bought...
No, if you have commited certain crimes, you can not buy a gun. You also have to be a certain age in different states. I would think you have to be in the country legally also.