He is using aim bot Hack

Latest battle report,Fuselage target type aim bot ACC 37%

http://battlelog.battlefield.com/bf4/ja/battlereport/show/1/922311724265277376/1056495175/

TYPE 88 LMG KPM 9.35, HSKR 79.84

This number is abnormal and can not be done by humans

It is due to head shot target type aim bot

https://gyazo.com/8bf0566eeb8cf9b17fbb038e7036dbec