User blog comment:Hello Losers/Aftermath releases today/@comment-4550549-20121128211842/@comment-5041037-20121128231817

It's not too bad, according to Battlelog, it says "total" of 150m, implying you could get multiple headshots.

Assuming that the average firefight is about 20 or 30 meters, the assignment shouldn't be too hard.

Though I could be wrong.