I think you need to hit 3 targets without missing a single bullet in between. I was replaying the first mission in Awakening: No matter how quickly I zapped groups of 3 with my Stainen, MK wasn't happening. Then I played the level  with just the handgun. 100% accuracy and got 3 MKs.Â
I'm not sure this is the only way to get MKs, just that this worked for me. Something besides the SLS.
I think Multi-kills is to kill 3 or more without reloading, that's the result from my trial
I picked up the last guys gun (the dude on the stairs before the executioner and forgot which gun he has but that's the one I picked and used up after killing him) and used the Impact grenade on the Executioner....scoped him and just kept blasting til he dropped. Maybe 2 reloads. Finally got it after a buncha tries with dif weapons/classes then I read this lol... Thanks folks!
Did anyone notice the fire extinguishers close to the executioner in awakening? Shoot each as he walks close by, and throw an impact grenade. Beyond that, keep shooting at his head with whatever weapon you have (I don't recommend handguns), and he should drop well before the truck arrives. And thanks to EVERYONE here on the page. I also didnt know how to MK. I tried it a few times, got it once, had no idea how, but now I do. See you online.
What about AAW-1
The executioner will walk near all the the firesxtingisherA in a circuit. Shoot the extinguisher. You can kill him by shooting out 2-3 extinguishers. And several shots to the head between that.
Hallo Männer,
ich habe das Spiel jetzt bereits schon zum 4 mal neu geladen und neu begonnen und trotz aller Tips und trotz dem ich min. 3 Feide auf einmal erledigt habe, ganz gleich wie .... habe ich bis Dato tatsächlich nur einen Multi Kill auf meinem Konto ..was nun!!?