If you aim for the head it shouldn't be too difficult. Typically easier when in a bigger match, get the guy opposite you, roll to avoid being locked on then pick off the other guys.
Much easier if you start off on the end as you can flank to one-side and shoot down the line. Also easier with revolvers rather than semi-auto pistols as they can still spray you to death even if you get nice head-shots on their mates.
It'll take some luck but if you get the head-shots right it shouldn't be too hard.