The campaign story mode will revolve around the Second Korean War.
The multiplayer will bring a lot of weapons. It is known you will be able to fly jets and helicopters, and pilot tanks. You automatically start out with each weapon, however, getting kills with the gun upgrades the attachments avaliable for them. Also, you can choose the camouflage you character wears.
These are all in the game files; it is unknown if all of them will be in the final game.
Light Machine Guns
You are able to pick one accessory.
Each one of these doesn't go with every weapon in the game. You can choose one attachment for your weapon.