I was looking at the sonic rifle and got to thinking, does concussive work against vehicles?
Would you allow this?
What about enclosed and/or armored vehicles?
Offhand I wanted to say no since the result seems to be a character-only thing, but I recall the powerharpoon on the T-47 has knockdown, which I assume is meant to work against vehicles (or at least walkers) so I got to second guessing myself....