Many of those kills was me running around listening to footsteps and encountering players. When using the Ump-45 and the other gun on assault, the recoil of the gun would usually end up me getting headshots.  Also 7-10 kills was me shooting down enemy choppers with anti-air missiles.

Whenever I go to a server, I'm always greeted with a banned for suspicious stats.  My KD isn't all that high and most of my kills was me sniping, sitting in a corner with an lmg or in a tank.  My profile is https://bf4db.com/player/1144435772