I believe that adding the Micro Tavor, X95 SMG, X95S, and X95 7.62 to the FIA Faction would make them more comparable to the variety of units found in the other factions as well have more specialized gear for different types of missions.

An example would be the Fuel Truck Mission and have Kerry using the X95 SMG or X95S instead of a full-sized variant to better reflect the stealth aspect of that mission.

Perhaps the variants could be part of the Marksman DLC.