LAW 80 firing AP at infantry?!?!

[rfisher]

I've made myself an SAS fighting column in the OOB editor, (ok, as far as realism goes, the battles are probably utter nonsense, but they are very cool!), but some (not all) of the SAS patrol units I've made fire their LAW 80s at some (again, not all) infantry units. I haven't messed around with any weapon stats, and they only have AP ammo. Have I stuffed something up while making these units?