The rocket launchers we have in game seems to be using HE ammo. It’s useful most of the time, but there are some situations that requires different ammunition.
The M3 Carl Gustaf has HEDP, which is a round that can pierce through walls and then detonate. Useful for enemies behind walls.
As shown here: https://m.youtube.com/watch?v=BOrZqZa14P8
If HEDP seems too over powered then maybe HEAT would be better suited. It can pierce through walls without the detonation part.
Rocket types aren’t just limited to the Gustaf either, there are many types for the AT4 and RPG.