The BATFE web site has information that can assist you in answering your question.
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"Best" is too subjective to define for a hand gun. The biggest, the most practical, the most accurate, the most concealable, and the most durable pistols are all totally different guns. Two very popular models are the 9mm Glock and .45 caliber 1911. Both are used extensively by law enforcement and military personnel.
A rock can be considered a weapon depending on how you use it. I think your question is "Can a 22 caliber Air gun be considered a firearm"You stated a 22 caliber BB gun. There is no such thing as a .22 caliber BB gun. In reality it's a .22 caliber pellet gun. BB are only made in .177 caliber.Your best answer should come from law enforcement in your area. It all depends on the location and country where you live.
A rock can be considered a weapon depending on how you use it. I think your question is "Can a 22 caliber Air gun be considered a firearm"You stated a 22 caliber BB gun. There is no such thing as a .22 caliber BB gun. In reality it's a .22 caliber pellet gun. BB are only made in .177 caliber.Your best answer should come from law enforcement in your area. It all depends on the location and country where you live.
Federal law mandates that you be at least 18 to purchase a long gun.
Legal implies a law. Laws are based on where you are. We get questions from many different nations here. In the US, there is no limit on the size or caliber- except that firearms larger than .50 caliber without a recognized sporting use (such as a shotgun, elephant gun, etc) must be registered as a Destructive Device, and a $200 Federal tax paid on the transfer of it to you. But if you want to own your very own cannon you can (and some folks do)
Depends on the law where YOU are- and you did not share where you are.
Depends on the law of your state. It is not required under Federal law
No- that is limited to law enforcement officers
Federal law is 21
It depends on the state and local law. Federal law stipulates you can purchase a long gun at 18 and hand guns at 21.
We can't tell, Check with local law enforcement- they can run the gun through the NCIC system. They will likely wan the gun in hand when they do that.