Acid and Fatal Throw

[Niko]

Wonder how Acid is specified/worded in the equations, as it definitely works with Fatal Throw (the 100% critical part), but seemingly does not work with Ripper. Feels like it is classed as a throwing knife on some parts. Which feats are supposed to work with Acid? Just curious

[cypherusuh]

I'm not sure if it even applied on the 100% part, but if it does, then its probably a bug.
afaik it doesn't restore AP nor doesn't work with ripper, because it only applied on Throwing Knife and Shuriken. Maybe Throw Acid Phial works with Three-Pinter instead of Fatal Throw?