I played against this Guy today and he 1 shot me across half of the length of Locker with an MG4.
He then continued and went 39/1. All kills with MG4. Video Evidence and Report are both Provided.
As seen in the Video, the circumstances were optimal, with both of us combined not even having a ping of 50.
No noticeable Packet loss or Server problems.

https://www.youtube.com/watch?v=EzyOqI_FqaQ

https://battlelog.battlefield.com/bf4/battlereport/show/1/1679228427448238848/1004444713235/ 

He has a total KD of 6.88 with only 1K Kills with his most used Vehicle, yet Thousands of Kills with LMG's.
Yet his ACC with all of them is around 10% and as seen in the Video he is of the Spray and Pray Religion.
I honestly haven't seen a Cheater as blatant as this in quite a while.

https://bf4db.com/player/100444471323

Click on the report button on his profile. 

Done.
Cheers

Will be reviewed when possible. Thanks.