Are they Visible or Not?

[Rabbit]

Just to provide an example:

If you had one leader, a squad of six men and a second squad of nine men. If only one man in the squad of six men fired, then the entire squad of six men would become visible. However both the leader and the second squad of nine men would remain concealed.

It is also worth noting that I believe only the weapon that fired becomes unconcealed. Meaning if the six men carried a LMG and rifles but only the LMG fired, then only the LMG would become unconcealed (along with that entire squad). Because of this, you know there is a squad there, but you only know about the particular weapon that fired. (Someone please correct me if I'm wrong about this.)