Yes, Pennsylvania permit all NFA items, except for explosive Destructive Devices.
After you apply to the police asking for a permit, you can buya gun in Pennsylvania.
AK-47 models are not fully illegal, it's that the fully automatic variants are restricted to military usage and thus a typical civilian cannot get easy ownership of such rifle. However, semi-automatic versions are legal for civilians to own. If you live in a place where semi-automatic rifles aren't restricted, then you're in luck to getting the semi-auto AK-47.
18.
Yes
18 theres alot of money and stuff involved to own one legally
In America, yes. You must have the proper paperwork and taxes paid.
Provided you follow all the appropriate laws, yes.
You can. It is not against the law to own fully automatic weapons provided you follow all the rules. 21, clean criminal record, money to buy, CLEO signature, etc..
Yes, provided the firearm itself is legally obtained.
Yes, in accordance with the provisions of the National Firearms Act of 1934.
If you follow all the laws, yes.
yes you can but an ak47 at any gunstore but theyll be semi automatic if you want a full auto you need a class3 weapons permit and you have to pay 200$ for a tax stamp