Call of Duty: Black Ops 3 - Quad Feed Medal

This video shows how you can earn a Quad Feed Medal. You need to kill four people rapidly with a gun and not with any killstreaks. such that it should display those four kills in a line without interruption and within like 3 seconds. Its quite hard to earn it because some others may kill others and interrupt the kill feed. Well that would be a bad timing. This challenge is not to be mistaken for Fury Kill Medal/Challenge. Good Luck!