Many gun dealers do take firearms in trade. It is up to the individual dealer. However, you must be able to legally own a handgun to do that.
No
No. It's as simple as that.
Ammunition.
Rifle, Shotgun, Handgun, Artillery
Rifle or handgun?
You will have to specifiy if it is a handgun, rifle or shotgun.
18 for a shotgun/hunting rifle, and 21 for a handgun.
Caliber
The grooves in the barrel.
caliber
.22 Long Rifle bullets...
Under FEDERAL law, which applies in every state, you must be 21 to purchase ammo for a handgun. Ammo that may be used in a handgun or rifle may be purchased at 18 IF the seller knows that it will be used for a rifle.