OK, this is an idea I had that is a weapon and a script put into one. (cos I couldn't think how else it could work
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I'm not sure if they use them any more, but it would be good to have a modern day (or not too long ago) flame thrower. BUT (this is where the script comes in), to make it a real good weapon, you could make it so when you fire the weapon at a certain building (selected in the editor), the building explodes into flames, killing everyone inside, but not the player outside.
It would need a good fire script as well, but it could make clearing out bunkers alot easier and funner etc.
I think the last time flame throwers were used in war was vietnam, but i'm not sure. So far, in OFP, the only flame throwers i've seen are WW2 ones, that only kill people 1 metre away from you.