A Nerf Gun That Shoots Salt?


We have a cottage on a lake in Wisconsin and sometimes the mosquitoes and biting flies can get a bit thick out there.  While searching for a solution online, I came across this contraption. 

OK so I get that this might be fun shooting bugs for about 10 minutes or so, but for $59 on Amazon I'll need to find some additional uses for this thing to justify the cost.

I'm open to suggestions.  :-)