While it is supposed to take 24 hours to do each job tier, it's bugged. Often times after logging out for a few hours, you can log back in and the "Get Help" button will work. With that said, here are the current job mastery items for Moscow:
Episode 1: Barsuk SUV: 36 attack, 52 defense
Episode 2: Boss Karpov's Pistol: 50 Attack, 38 Defense
Seems like a lot of work just for a few combat items that are not even that spectacular. As more chapters are released, I will update this page.