Using the 7.62 to get kills didn’t work, I tried everything suggested. I found a fix that works for me. When I fire up my xb to play I open the menu for the game on the home screen and select “quit”. Then launch the game. I haven’t been able to get the bonus challenges for over a month. Players can fix this issue by following the steps below: 1) Click on the 'Channels' option in the top-right corner of the main menu. 2) Click on 'Create your own channel,' name the channel, and RFaE.