He is using multiple hacks.

https://battlelog.battlefield.com/bf4/de/battlereport/show/1/957410703615920448/420636451/

http://www.bilder-upload.eu/show.php?file=37d9c3-1517105527.jpg

http://www.bilder-upload.eu/show.php?file=57924c-1517105572.jpg

He was also flying around in the next? round http://battlelog.battlefield.com/bf4/battlereport/show/1/957686396388409088/420636451/ and making single shot kills with his m320 every time.