Shooting CZ’s New P-10 C Pistol Underwater

With #SharkWeek upon us later this month, I figured it was time to gear up. You can never be too careful in the briny depths. Will CZ’s new P-10 C run reliably underwater? Only one way to find out!

Perhaps a bigger question is why we should care if the P-10 C runs underwater? Aside from sharks, of course. And mermaids.

I’ve got nothin’, so don’t ask me.

But I do know the gun will run a couple feet down. It actually ejected with relative authority, clearing the empty case of the slide by a safe margin.

And the striker, despite its channel undoubtedly being completely full of water, wasn’t impeded in its forward progress. The P-10 C fired 10 out of 10 rounds without a hitch.

I had thought about SCUBA diving off the end of the dock and doing this test at ~35 feet down, but chose not to as 1) I didn’t have my GoPro and 2) I wasn’t sure what diving with hearing protection would be like or how it would function.

After doing this test with my head above the surface and my arm submerged past the elbow, I’m very happy I didn’t attempt it with my head under water, too. The underwater concussion was massive, and I have no idea what the shock wave would have done to my sinuses and ears and bowels and whatnot, but I’m glad I didn’t find out.

Above the water, the massive subwoofer-like THUMP was notable even to my dad, who was about 50 yards away inside the cabin looking all around, confused like the chicken in Moana, trying to figure out what on earth was going on.

Afterwards I field stripped the P-10 C and left it to dry in the sun. Rust free, she ran like new when reassembled. It has yet to be cleaned or lubed at all since coming out of the factory case some 600 rounds ago, actually. Sharks, beware.

* Don’t try this at home. Shooting under water is a bad idea. Also, thanks to CZ-USA for loaning us this gun. We’re taking good care of it.


  1. avatar Vitsaus says:

    But I thought only Glocks could do this.

    1. avatar Joel says:

      “And thanks to CZ for loaning us this gun. We’re taking good care of it”

      I haven’t laughed that hard all week. Thanks Jeremy. ?

      1. avatar Jeremy S. says:

        On Saturday it goes through Ron’s combat pistol course, which is on a dirt/sand range from 5:00 PM to 1:00 AM. There are no plans to ever clean or lube it haha.

  2. avatar Tom in Oregon says:

    I did that with my G17 in waste deep water. That freekin hurt.
    Sound travels 25 times farther underwater.
    Be very glad you didn’t do it submerged.

    1. avatar Geoff PR says:

      “I did that with my G17 in waste deep water.”

      You SCUBA in sewers? Yeeeeeeeech! ๐Ÿ˜‰

      1. avatar MyName says:

        That’s where you find guns in NYC, apparently.

      2. avatar Tom in Oregon says:

        Darn autocorrect.

  3. avatar Geoff PR says:

    “And the striker, despite its channel undoubtedly being completely full of water, wasnโ€™t impeded in its forward progress.”

    It’s *possible* they designed to function underwater if need be.

    Glocks do it by slotting the plastic firing pin cup (in their ‘marine’ firing pin cup) to allow the water a place to go. I suspect other guns may do the same if similar mods were done to them.

    Jeremy, your mission, if you accept it, will be to repeat that test on a suppressed gun to see if it quiets them.

    You may not want to risk destroying the can, tho…

    1. avatar Badwolf says:

      Someone on the internet did that already. Sorry can’t remember where.

      Anyway, he found that you need a special suppressor for water use. Typical suppressors (that work in air) don’t work underwater.

  4. avatar CLarson says:


  5. avatar Anonymous says:

    Not Impressed.

    1. avatar NorincoJay says:

      Considering the projectile only goes a few feet it’s pretty worthless with normal bullets.

      1. avatar Geoff PR says:

        “Considering the projectile only goes a few feet itโ€™s pretty worthless with normal bullets.”

        Then use ammunition designed to go 15 yards underwater:

        1. avatar NorincoJay says:

          Interesting. They even have it in 5.56.

        2. avatar Swarf says:

          I’ve always wanted to shoot a plum bob.

      2. avatar Klause Von Schmitto says:

        The scuba crowd down here hunt Lionfish all the time with regular bullets. I don’t know from what range but they kill a lot of the invasive bastards.

  6. avatar OkieRim says:

    Nice….I will sleep better knowing that your bowels are still intact.

    1. avatar Jeremy S. says:

      Any project that ends with intact bowels is a success in my book!

    2. avatar John Fritz, HMFIC says:

      I would’ve never tried that SCUBA diving.

      It could be the unintentional Brown Note.

  7. These guys did it and had to make an underwater “silencer” because they were gonna blow out their eardrums. Now they say that the “underwater silencer” did not dampen any sound in air, but I find that hard to believe.

    And this looks like a ton of fun.

  8. avatar NorincoJay says:

    Thats what powerheads are for. I’ve shot a .38spc from one underwater it’s not that bad and works well on bull-sharks. But it’s at the end of a spear right up against the shark. So it’s somewhat further from your ear.

  9. avatar Frank says:

    Well that is the way to test a gun. Decide to do it and tape it, then upload to you tube. ๐Ÿ™‚

    1. avatar Jeremy S. says:

      Welcome to 2017 ๐Ÿ˜‰

  10. avatar Docduracoat says:

    I was taught that shooting a gun with the barrel obstructed by water would cause the barrel to explode
    Where did that story ever come from?

    1. avatar Jeremy S. says:

      Ehhhh. Though keep in mind 9mm at a max of 35k psi in a 4.5″ barrel full of water is a different beast from 5.56 at 62k psi in a 20″ barrel full of water plus there’s no gas system, etc etc

      1. avatar Geoff PR says:

        An extra ‘H’ HBAR then?

    2. avatar Cj says:

      Demolition Ranch has a video on that, although he used a shotgun.

  11. avatar John H Haley says:

    The water in the barrel is certainly an obstruction. We’ve all been told, and seen it’s true, that this can cause bad things to happen. I would expect that to happen underwater, but have seen often that it does not, as here. Anyone know why?

    If I take my .44 mag or my .460 S & W swimming, what should I expect? Maybe a Darwin award?

  12. avatar gargoil says:

    face palm

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