@Wolvierine , I had the same issue today as well. I had the pop-up, but no offer available. I assume it is unavailable to me because I have not yet acquired an initial copy of this weapon. Perhaps you are in the same situation.
@Ned, @Keith, these pop-ups are problematic. Players do not want them. There is a good reason most PC browsers come with pop-up blockers. Additionally, it is tiresome for some players to endlessly receive these pop-ups for offers unavailable to us. Please forward these comments to development team.