Not so sure about that! I think that the combat armor on the one hand will seriously cut down on the AR's effectiveness, and that the laser rifles should result in dropping a pirate with every shot. In a situation like this, you might well have your armored mercs lining up in the hall in ranks: two down low in front, two standing behind, or maybe three and three - firing away and relying on their armor rather than evading. The pirates won't be able to do that and survive: they'll have to be firing from around corners and evading.