Question / Help Audio Delay

Okay, so I have been using OBS to record and stream for awhile now and it's been completely fine, but just recently my audio started going out of sync. I was editing a Far Cry 4 video and I noticed that whenever I shot my gun, the animation would play out first and then the sound about a second after. It's very noticeable (especially if I use facecam) and I have no clue how to fix it. Anyone have any ideas? I'll link a video in this thread for example.

http://youtu.be/JLyydYS6-W8
 
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