Legally, no.
No.
Not in the U.S.
Yes, provided they have appropriate supervision.
Without Adult Supervision anything is possible. Is it worth the chance. BB guns are NOT toys.
They can under adult supervision. This is the age to learn respect for, and how to handle a firearm.
Under the supervision of a knowledgeable adult it would be OKAY.
If charged as an adult, 1-5 years.
It's up to your parents. But in most placed you must be 18 to purchase one.
Seeing as the minimum age of 11 is required to play at fields, any 11 year old will not be experienced, and probably not mature. Besides this, the legal age to buy paintball equipment is 18, so unless the 11 year old convinces a parent or guardian to buy one for them, they are out of options.
11 to play at fields, 18 to buy a paintball gun.
ask another eleven year old.
That decision is up to the parents. Is the child mature enough to use the gun with care. Do they know how to handle the gun safely. Do they know it's NOT a Toy. All these things should be considered.