aimbot , and he updated the name to "ProSniper3211" lol , "3211" must be a aimbot build version :)

just look on HSK stats 

and example :

http://battlelog.battlefield.com/bf4/battlereport/show/1/1037110186022178560/900380974/

http://battlelog.battlefield.com/bf4/battlereport/show/1/1036214289583251328/900380974/

http://battlelog.battlefield.com/bf4/battlereport/show/1/1036061511258721664/900380974/

http://battlelog.battlefield.com/bf4/battlereport/show/1/1036094653638204224/900380974/