I have, in a closet somewhere in my house, a spring-powered swatting gun
It's made of a cheery shade of red plastic, and it looks more like a raygun than a swatting device, but its purpose is apparent.
It looks like this:
\/ | \
========<| |- Swatter
/ = / | /
/ / \
/_/ \- Trigger
When you pull the trigger, the swatter is propelled forward at the target by means of the spring. A small string is attached to the swatter so that it doesn't disappear behind the couch, although it also limits the range.
The swatter is a circle of white plastic mesh about 4-5 inches in diameter.
It's a nifty device, although not very practical. I always had fun with it, although I don't think we've ever actually killed a bug with it.