Months back I acquired a Choir of One, I don’t remember how. I never completed an Encore mission, till recently. In the last few days I’ve completed 5 Encore missions, two of those on Master level. Rewards (perks and such) appeared to have dropped for the gun, I saw them on screen at the end of each mission, but I can’t find them on my character or in inventory. Opening my Choir screen shows nothing new. What am I missing? How do I upgrade the gun? Thx