No concrete proof, but consistently plays with http://battlelog.battlefield.com/bf4/soldier/maachudale/stats/1867395051/pc/

who is hacking for sure

Plus, who gets 4-5% acc in a lav?

http://battlelog.battlefield.com/bf4/battlereport/show/1/877283332933682240/1868222215/

Yea, this is pretty obvious damage mod.  It's all over the place with the BTR, but I managed to isolate the damage mod on the MX4 specifically from that round.  He's banned.