Don't know How Long ago but someone posted a video of a trebuchet launching a squirrel(s) a good long distance. My self when the rodent enters the pvc and tips it forward might be better if the tipping ignites a cherry bomb or an M-80 or the good ol silver salute. Few extra holes in the length of the pipe for pressure relief. Relocate hell-kill and then release.

Had a few on my dinner plate all cleaned up and cooked good. Then Illinois got pissy and wouldn't let us use .22s any more fer squirrel huntin.

Remington with a weaver 2 X 6 variable scope. Made head shots somewhat easier. RIDE SAFE.