jayteeto, and therein lies the rub. A 9mm and 13 rounds is not worth the trouble carrying it. Even as static aircraft guarding it is useless. As a personal weapon of an FOB, coming face to face with intruders, you might have a slim chance apart from the Rock paranoia of making safe when you go into a building.
As individual downed aircrew, even if two of you join up, you are going to be luck to survive a shoot out.