I did forget to add in that they carry 1-6 AA/AT missiles, fire and forget, teleguided, with a plasma warhead.
It was late, what can I say.
About have 2 LMG's and more per squad, as is, they only have 2000 rounds of ammo, so I am leery of putting another MG or Heavy Weapons in the squad.
Support Weapons would be a Lt MRL, on a pop-up mount on a G-Carrier:
TL 12 Lt. MRL Crew 1, Price .5/30, Wgt 60/5 Range 11 km, ROF 100 per round, Burst Radius 4 m. I would figure it carries multi-role missiles, such as the AT/AA Plasma warhead types as well as conventional HE, TDX, etc..
Fire Support, Ortillery and other wise, would be one trooper working with the grenadier, or the grenadier themselves as the GL has the laser range finder, laser painting device, otherwise, with FS enabled, it's just call for support by toggling a button, place the reticule on the target and FFE. Ship's like the Broadsword, with it's lasers, can also do AA and AT work, Lasers travel at the speed of light, just uplink with the soldier's HUD and sensor package.