Foam Force Pistols have 'Esoteric' combat qualities

[tostah]

So, whats the secret behind the foam force pistol?

[Jacquerel]

From looking at code it seems like it applies that label to ammo that either has a 0 or negative damage multiplier, or that does no damage at all either to stamina or to health.
I don't know why "foam_force" has an underscore in it though.