I've been playing this game since Beta, and I have literally never seen someone get this medal.
I've seen two or three people with the medal in their profiles, but I know for a fact that these people farmed for it by matching teams of friends in 6s. 
For those of you who don't know, the medal is rewarded upon the rapid killing of 4 enemies. 
Why does Bungo put medals like this, Phantom, and Relentless in the game, when nobody can get them without cheating?
						
					
					
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	I'm not the greatest at Crucible, but I've gotten it on my Hunter 9 times. And I pretty much only use Gunslinger in PvP. [spoiler]And [b]not[/b] with Symbiote Achliophage, cuz I don't care to have an extra GG shot [/spoiler]
 
										 
					 
		    