when I played the demo I notice that I can upgrade my weapons. (which is a selling point 4 me)
but my question is.. when I upgrade a weapon does the upgrade stay on the weapon throughout the game?
I've heard that you have to REupgrade the same weapon every mission.  (which is not a selling point 4 me)

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Relax, it's just a game

The weapon upgrades stay with the weapon, unless you start a completely new game. Did this on accident when I wanted to play the campaign over. Make sure that once you finish the game you go to mission select not new campaign, LOL!

You also have to upgrade the weapons online, doing them on campaign won't upgrade them for online play, although no one plays much anymore.

great! thx!!

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Relax, it's just a game