Back in the old days, there were five platoon types. Rifle, Flamer, Machine Gun, SRM, and Laser.
Old portable laser platoons did a lot of damage and in concept were presumably infantry equipped with support lasers.
Unfortunately, that unit type didn't quite make through the revisions for total warfare. The Rifle (energy) troops are more soldiers armed with laser rifles, and there is no "support laser" option among the generic infantry units.
If you have tech manual, you can make your own. There are also people around here who would be eager to help.
