No because it's against the law and you can be put in jail for buying guns.
GCA 68
18 for long guns 21 for hand guns State laws vary so much that you have to contact your local police for a current, legal answer.
most likely mw3 will have guns and attachments that you will unlock from level to level.you probably will not see and point system to buy attatchments for guns
You may not purchace airsoft guns or accessories under the age of 18.
No set number. But if you are "engaging in the business " of buying and selling guns, you need a dealer's license.
Federal law is 18 for long guns and 21 for handguns. Residents only, military excepted.
by buying them in the gun shop
It means that a gun is in new, not used, condition.
Safety rules and basic marksmanship rules. Take a class from the NRA
Air guns for you don't have to keep re-filling CO2 cartridges or buying new ones.
If safety rules are not followed, they can be.