yes, you just need a license
Buy an new one or take it to an airsoft shop or army navy.
Double Eagle guns are cheap Chinese toys. They cannot be upgraded. You should buy Classic Army or Marui airsoft gun, they are easy to upgrade.
Army green with a special hat (and a gun!)
No you cannot buy a gun on The Sims 3.
You have to be 18 to buy a long gun and 21 to buy a hand gun.
Gun shop.
Most army Navy stores and pawn shops carry them. Many regular gun shops do also. If not they can order you one.
Yes, you can buy a gun case for anyone.
You can not buy a gun in Wisconsin and live somewhere else. In order to by a gun in Wisconsin you have to live there.
buy (gun here) e.g. buy ray gun
if your looking for a gun that you can upgrade/ downgrade easier, i would go with the classic army. but if your looking for an outdoor gun go with the echo 1. it is ready for outdoor right out of the box and it comes with a 450 highcap mag and 100 midcap mag if you buy from Shortyusa.com
Dumbledore's Army is a group of people - you can't buy them.