He was using some kind of aimbot and maybe a damage mod.
I link the battle report: http://battlelog.battlefield.com/bf4/it/battlereport/show/1/1017745217322650368/1003823787142/
https://bf4db.com/player/1003823787142/snapshot/12741
http://battlelog.battlefield.com/bf4/battlereport/show/1/1017488352927809792/1003823787142/
http://battlelog.battlefield.com/bf4/battlereport/show/1/1017484202211016960/1003823787142/
http://battlelog.battlefield.com/bf4/battlereport/show/1/1017460583955181376/1003823787142/
http://battlelog.battlefield.com/bf4/battlereport/show/1/1017745217322650368/1003823787142/
Reason: Aimbot
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