It depends on whether you mean legally, or what is the biggest handgun available, and whether you mean handgun size, or caliber size.
The largest commonly available caliber is .45 ACP, however, .50 AE is also fairly common. That said though, there is also a handgun available in .600 NE.
Most states don't have restrictions on caliber, however, some may.
No, it is not legal to purchase a handgun at the age of 18 in Virginia. The minimum age to purchase a handgun in Virginia is 21.
In the United States, you can legally purchase a handgun at the age of 18 from a licensed firearms dealer.
To legally purchase or own a handgun, you must be 21.
Smith and Wesson 500
You will haver to define if "biggest" means caliber or overall size.
No
Depends on where you live- you did not share what state or country you live in. In much, but not all of the US, you may possess a handgun at 18. You may not purchase a handgun from a dealer until you are 21 (Federal law applies to all states) and you may not purchase handgun ammo.
To legally purchase a handgun out of state, you must have an FFL dealer ship the handgun to an FFL dealer in your state.
No, it is not legal to buy a handgun at the age of 18. The minimum age to purchase a handgun in the United States is 21.
It depends on what you mean. If you live in the U.S. you can only legally purchase a handgun in the state where you live. If you live in one state but want to purchase a handgun in another state, you have to have a licensed gun dealer in the other state ship the handgun to a licenesed gun dealer in your state and then purchase it through the dealer in your state.
Depends on what you mean by biggest. There is a revolver in .600 Nitro Express, and 12 guage pistols.
If you're purchasing a handgun from a licensed dealer, you fill out a Form 4473.