Are you low on tactical assault crossbows? I know that you are. These are crossbows which use the receivers of AR15 assault rifles. No, I'm not kidding. But the TAC15's are pricey -- plus you have to add the AR15 to them.
Also interesting is that many people, apparently in fear of the coming zombie holocaust, have made their own repeating crossbows.
Which is pretty amazing if you ask me.
What we need are the anti-aircraft version of a crossbow. The equivalent of the German 88's in crossbows.