Ping-pong launcher your wife can’t know about


Sometime the projects you see at the local hacker space are better left a secret when you return home for the evening. Case in point, this ping-pong ball launcher that can put holes in a sheet of OSB. The projectile is made more lethal because the ball has been injected with water to dramatically increase the density. Compressed air is used to propel it from the 14 round magazine with devastating effect.

We’ve embedded a video of the gun being fired after the break. The creator, [Ron Kessinger], demonstrated this at a Denver hacker space called Club Workshop. We’re hoping there’s no plans for turret automation because this thing’s dangerous! Either way, the significant other who usually watches out for our safety would never approve.


  1. jrw says:


    This is a completely pointless hack but a completely awesome one.

  2. M4CGYV3R says:

    That is insane…

  3. sly says:

    that is a ping pong ball launcher turned up to 13 (forget 11, that was passed)

  4. Alex Dodge says:

    I like the guy walking up to see the damage before the gun has been powered down. 14-round magazine you say?

  5. vidiot bod says:

    i can think of another ping pong ball launcher i wouldnt want the wife to know about…

  6. polymath says:

    this could revolutionize paint ball… and give me one more reason to build a carbon fiber Master Chief costume.

  7. joe says:

    Here’s a parade that needs some rain. If I put some lead shot in a pillow, I didn’t make a lethal pillow. This is just a complicated water gun.

  8. eric says:

    you beat me to it vidiot !!!! was thinking the same thing when i read the headline

  9. vidiot bod says:

    i’m glad i’m not the only one with a warped mind eric!

  10. joben says:

    “this could revolutionize paint ball… and give me one more reason to build a carbon fiber Master Chief costume.”

    wow thats fucking lame.

  11. joben says:


  12. smilr says:

    Hell – fire a pillow fast enough, no lead shot needed, and you’d have enough energy to kill something. (whether you can achieve such velocity outside of a vacuum is another matter entirely)

    Calling this a “water gun” is like calling the Columbia River a “slight trickle”

  13. some faggot says:

    you guys are belittling homosexuals here, please change ‘wife’ to ‘spouse’.This is very offensive.

  14. canbot says:

    Maybe his wife helped him build it; you don’t know.


  15. Mike Szczys says:

    OK, everyone whose ‘significant other’ would be fine with you bringing this home please raise your hand.

    I thought so.

    • Johnny O. Farnen says:

      Hell, my wife sent me the video just before you posted it. She included the tag line:

      “Would this keep the deer out of the garden better than that motion sensing sprinkler monstrosoty you built?”

  16. James says:

    (Though I’m not sure I quite follow the innuendos here, so may have missed the joke!)

  17. James says:

    Ooh, that was meant to be a raised hand but the script seems to have stripped out anything between my > and <'s :)

  18. Andy says:

    I don’t see why everyone is so stunned that ~30g of water moving at a few hundred FPS will go through common building materials…..

  19. Richard says:

    @ Mike Szczys, my wife would cheerfully help me build something like this – or more likely build a ‘rival’ one of her own to compete in destroying things.

    Geek wives FTW!

  20. srilyk says:

    Like a few others – filling a ping pong ball with water to make it lethal means it’s no longer just a ping pong ball.

    If you can fire a regular ping pong ball through OSB then I’ll be interested. Shooting something with the approximate mass of a golf ball through OSB is not so impressive.

  21. Riley says:

    It may no longer be just a ping pong ball, but I think the point is that the gun IS “just a ping pong ball launcher”. IE, your light cannon is going to be found technically legal, unless loaded and used in a less than legal manner. Great for all those high-powered weaponry nuts. ^_^

    I somehow think a vehicle mount would get you pulled over though.

  22. Schilcote says:


    Yeah, anything attatched to a car that can move off of the car is illegal. Google McMissile, where a woman was charged with firing a missile from her vehicle (said missile was a McDonalds cup).

    Apparently, no one around here knows how to make a tennis ball incendiary grenade. Fire one of those babies out of that thing and you’ve got artillery!

  23. Martainn says:

    Your thoughtfulness shows in everything you do.

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