When I joined an MP game of Conflict and tried to use my sights, I couldn't look down them. It would instead look down the side of the gun. I believe 3rd person was also disabled for me but both 3rd person and sights came back after I quit the game and came back to the server. I'm not sure of the conditions that caused it. Every weapon I tried had the same problem and when I dropped it and picked it back up the problem persisted. It also persisted after I died. Still got one of the commie bastards though!