Never seen this before, very cool Lenn!
Don't really see it as dangerous, as long as the projectile is allowed to clear the barrel... unless one comments from the other side of the fence of course.
Now that’s a fun way to cut wires!
Thanks for the link Lenn...
As i assumed, pretty useless when under fire, or even worse trying to sneak through enemy lines, where its use would turn any silent movement into "under fire" quite rapidly...but nonetheless a quite well functioning, and a fun oddity in infantery history.