This achievement requires you to get 10 kills without dying. Not go 10-0 or anything to that matter. Simply a killing spree of 10. Your final kill for the spree cannot be the kill that finishes the match. The simplest way to do this is to invite a friend and then kill them 10 times while inside a ranked or player match.
If you’re going for this legit then I recommend using a sniper. Thanks to the increased range you can stay back and away from gunfire; this gives you enough time to kill enemies who haven’t spotted you and run from enemies who have.