That won't be much of a problem... From the plans, it doesn't seem like they'd work on anything but dragons.

[ They're a very specialized sort of weapon, as far as Cain can tell. Though then again, maybe it'd be a problem with the dragons in Wyver. Still, it's something they have to consider for later. After they've dealt with the looming threat of the dragon coming to kill them all. ]

I have a few ideas about that, anyway. It depends on your skills, though. Can you design a targeting mechanism for the guns? Say, something that will only allow them to fire at something of a certain size?