I posted over on the Traveller forums regarding how best to deal with Combat Armor. Feedback was that best attack against Combat Armor is to use Gauss rifles or Heavy ACRs with AP ammo. Gauss rifle is already AP5, and with AP ammo that becomes AP9, heavy ACRs are not quite as good but cheaper.
In our case though, Laser weapons are made for boarding actions, low recoil and not too destructive to the ship. So our best bet on a ship like we were on would be Laser Rifles instead of Laser Carbines.