Is anyone else having an issue finding the fourth fusion rifle to start the Sleeper Simulant quest??? I've been doing tons of heroic strikes/ patrolling all of the planets daily. Killing Champions/ doing every mission with a war mind or Rasputin related. Activated three of coins and killing everything in my path and I am having no luck. I acquired the first three fairly quickly but I've hit a wall. I've been doing this since this quest was released with no luck. Any tips would be greatly appreciated or info on where people have gotten there's. Thanks!