GREAT GAME, BUT! – CrossFire: Legends Review

I’ll make it short, its a game that Im almost addicted to but WHY cant I exchange or even redeem back one of the older AK47 series when I have the one I have now. Why can’t I go back to the other one and supposedly it says that “The refinement level of your old weapon will be kept”, ARE YOU PLAYING WITH US OR WHAT?
Review by Mert.1995 on CrossFire: Legends.