Although this may look like SG15-A14 RAM Mortars, a fair portion of it is actually SG15-A10 Command/Comms figures.
The original pack came with 2 kneeling crewmen with datapads (as seen in the team on the left) and 2 kneeling with magnoculars. I'm assuming that in the hi-tech sci-fi age, they'll have a spotter who can advise on the fall of shot via com system (or the grid if playing Tomorrow's War). This being the case, I've used the figures with magnoculars elsewhere and substituted the two female comms officers from the command pack. Their nonchalant non-combat poses match perfectly with the idea of being on the mortar line well out of normal weapon range of the enemy. (I've noticed there seems to be a lack of female front-line troops in the NAC. Colonist/civilian and colonial security packs tend to have a 50/50 male/female mix, but these are the only 2 females I've spotted in the NAC military!)
RAM mortar = Rocket Assisted Munition? Any thoughts?