well i was thinking to give him (for coding reasons he's alone) a sligthly more firepower, may be a 20mM, same ammo as the HMG and due to the fact that the armour is much better it wouldn't be fair to have a couple of spare life hidden in the bushes while you charge with one (my favourite way to use infantry in close combat), heavy infantry's slow so other than ambushes or suppport fire has no roles, we could think to make just the specialist, make it a little tough with his impressive exoskeleton and go with one only