[Mobhack]

Opfire filtering works on the unit basis - not the weapon line basis.

If you dont want a particular weapon to fire, you need to turn it off.

If you dont want the unit to fire at all, then selecting a range of 1 is usually the quickest way. The unit will of course return fire if the opponent fires on it, if it can - that is how filtering works if it getss shot at in order to allow return fire.

Opfire filtering can be handy for eg making ATGM teams select MBT sized targets but not scout cars, or setting an overwatch circle on say an exit from a town.