Question: Infantry anti-tank weapons

[Revenant]

I know its in the game guide.

Problem is that some units have weapons which have only AP ammo listed, yet they have zero penetration for that type of ammo.

examples:
RPG40 - pen 2:0 HEAT:3 (no HE ammo)
RPG43 - pen 4:0 HEAT:7 (no HE ammo)

similar is molotov , who has pen 4:0 HEAT:9 , but this weapon has some HE ammo and some AP ammo in several cases

Geballte ladung - pen 2:0 HEAT:2 (has usually both HE and AP ammo)

Those close ranged explosive weapons never have any kind of HEAT ammo listed (I thought only first slot weapon can have special ammo, but its possible to some weapons have "hidden" HEAT capability).

Funny is, I can defeat tanks with AP Geballte ladung pretty nice, even if it has zero penetration. So I concluded there is some hidden quality in that and thats why I asked.