Go onto his BF4stats.com profile and look at every single automatic weapon having 30%+ HS/K%.

Dude was going ham in our server at Migaming.us

In addition to that, every single time this guy plays he gets 3+ HS ribbons.

http://battlelog.battlefield.com/bf4/battlereport/show/1/956770337874586368/943729255/

http://battlelog.battlefield.com/bf4/battlereport/show/1/956760951378744448/943729255/

http://battlelog.battlefield.com/bf4/battlereport/show/1/956745422559587520/943729255/

http://battlelog.battlefield.com/bf4/battlereport/show/1/922533058929616832/943729255/

http://battlelog.battlefield.com/bf4/battlereport/show/1/956917495798329344/943729255/

:)