I have one of these "a-salt" weapons myself.
I should be a distributor for them.
I played a gig at a popular bar & steakhouse for the grand opening of their new beer garden last summer.
-Good thing I brought my "gun". The flies were mucho abundant.
I gave the rifle to a friend who passed it around, and about a dozen people ordered at least one of them. Not only for themselves but for gifts.
I also happen to be the Surgeon General of the FCMC. (Fly Cutter's Motorcycle Club- Black Hills Chapter).
"One fly under a blade -divisible
makes life less miserable- for all!"
But that's another story.