[Firefly]

You mean intra-squad? As in, within the squad? Or inter-squad as in, between two different squads?

I don't think it needs that stuff - the MCG was about as heavy-MG as it got. I think it's up to the squad to perform coordinated attacks. My outfit regularly made use of fire teams in full squads - odd numbers were Fire Team A, even numbers were Fire Team B. Fire Team A would fix a group of enemy in place, Fire Team B would perform what's called a flanking manoeuvre.