In fact upon rewatching it, your teammates all run down the middle of where the rift spawns, they were likely at that corner, and that's where he got hit from.

Dude you fired 4 bursts. From the hip. You really think you did that much damage? I dunno what hit him but something did. Not you. You can even see how little damage you'd done when all of a sudden his shields are gone and he's at like 3/4 health. He probably got sniped. No offense, good kill but you're delusional if you think it was all you. And if you think it was, do it again. In fact, I'll go in Rumble with you, charge my super, and let you 4 burst my ADS to the head, and melee me. 4 bursts and one melee. Sorry bud but it's not happening.

It was the lag, once I was able to damage him I dropped six shots worth 9 damage each plus three heads hits worth 13 each. 9x6 is 54 plus 13x3(39) is 93 damage, plus another burst of 3x9(27) after, which is well enough to take his shield down and be finished with a melee. [spoiler]i know, I just inspected the shit out of the clip. [/spoiler]

Good luck buddy. Not gonna argue with you. Just gonna mute and move on.

Oh no! I've been muted! What ever shall I do?

I'm delusional? Where do you suggest this "magic bullet" came from? Have you played vertigo? Where I encountered him I was alone. No one was at B and you could see this if you pause the vid at the right time. And there were no other team mates in my vicinity, other wise you would see their name tag on my screen or blimp in my radar. Hit him with 3-4 burst none taking damage at the time of impact, the 5th burst coupled with all the damage from the other burst coming at once was enough to take his shield down and the punch to finish him off. I asked my teammates if anyone shot him after, everyone said they did not. People are seriously over exaggerating the shields on Sunbreaker.