I am experiencing the exact same issue. I have finished the entire campaign but these two weapons are still stuck in my loadout and they can not be moved. In-game there is the option to "Dismantle" them but I haven't tried this yet because I don't particularly want to lose these weapons. I'd love to keep them but only if they would behave like any other weapon and could be moved to the vault. They are actually quite useful weapons for me at the moment but I don't like that they're stuck on my character's loadout! Edit: The way I played the Red War campaign is as follows: One night I played the Homecoming mission and at the end of it I shut down the game. I intended to play this campaign with my buddy and I thought that after chapter 1 it would be possible to co-op. Then another night me and my buddy discovered we had to play chapter 2 and 3 individually before we could co-op. So we did. Then for all the remaining chapters I joined my buddy's fireteam so we could finish it together. Maybe it's got something to do with the fact that I originally quit the campaign after Homecoming and the game didn't see an opportunity to remove the weapons from loadout? I'm guessing the easiest solution to this bug would be to dismantle the weapons – being that we're not supposed to have them in the first place – but that's not a very satisfying solution, is it?... :)