After completing the weekly rewards track last week, I logged in this week expecting to claim one of the Vanguard Arsenal Weapons, but it said I had already claimed it. I have logged out and back in several times this week, on a couple different characters, but the message stays the same. I completed the rewards track this week, and claimed the two armor pieces, but was never able to claim the weapon. You can see from my collections that I have never even acquired the MIDA Macro-Tool yet.