American Shooting Journal: Underwater Guns

If you previously watched on how water can deflect bullets in the D-Day post last week, one should know that merely a few feet of water is enough to slow a conventional bullet down from lethal to an annoying bump. As such, its an interesting question on how divers can engage in projectile-based combat.

Both the Americans and Russians have been working on underwater guns for some time, having gone through multiple iterations. In the first of a series of articles focusing on these contraptions, American Shooting Journal looks at the latest handguns, including the H&K P11 (you did know that H&K made an electrically fired underwater handgun, right?)PHOTO-3-Heckler-and-Koch-P11-Underwater-Pistol-1024x433

Hit the link for the full story. 

Nathan S

One of TFB’s resident Jarheads, Nathan now works within the firearms industry. A consecutive Marine rifle and pistol expert, he enjoys local 3-gun, NFA, gunsmithing, MSR’s, & high-speed gear. Nathan has traveled to over 30 countries working with US DoD & foreign MoDs.

The above post is my opinion and does not reflect the views of any company or organization.


  • Budogunner

    I’ll just leave this here…

    • Anon

      Something something navy seals

    • USMC03Vet

      Still better weapons handling than the LAPD….

    • MR

      Stop clubbing, baby seals.

      • Budogunner

        You can’t stop baby seals from clubbing. After a hard day of PT and shoot houses, they love nothing more than to hit the club and get ripped.

        Easy day.

    • Jon

      I’m sure they will prefer this,

  • CommonSense23

    The problem with the underwater firing weapons is while they can work, they are practically useless. First if you can see more than 5 feet while diving, you probably need to evaluate your dive plan. Second you don’t fight combat swimmers with combat swimmers. You use either the good old standbys of grenades and sonar to kill anyone within 15minutes worth of swimming, or you use the dolphins or other marine mammals which swim way to fast to get a shot off and have more better weapons than you do.

    • Kivaari

      While in Vietnamese harbors the base support provided around the clock grenade use to deter VC swimmers. They used concussion grenades. It could be very loud if they throw one close to the hull, and your compartment is below the water line. Very loud.

    • This is for units that are for infiltrating ships and from harbors. The weapons are silent. Its meant for firing from either the water or when you are out of it.

      • CommonSense23

        I know exactly what these weapons are for. The fact is though they are practically useless. The terminal ballistics are akin to a ice pick. Combat swimmers depend on stealth, not firepower to do their job.

        • Not true. They are quite effective outside of water and are very quiet. So they provide the firepower needed for the job and are stealthy. 98 ft out of the water is their max distance. Guess what an ice pick can kill you quite effectively. They have been used quite nicely against cops wearing bullet proof vests and a single one is all you need if you aim at the heart or brain case.

          • CommonSense23

            First how do you get that they are silent? They aren’t. Second, they are defensive weapons that came about due to the marine mammal programs that were being used by both the Soviets and the Americans. These were never meant to be offensive weapons.

          • They make as much noise as a silenced MP5SD. In other words beyond 20 feet people will not hear it going off.

            They are offensive and were devised by the German frogmen for use in special forces operations.

  • USMC03Vet

    The lack of underwater ranges is significantly impacting my SHTF/zombie/prepper training.

    I don’t know how I’m going to ever get my tier 1 gunfighter merit badge at this rate.

    • Grindstone50k

      Have to train in case ISIS invades through the mall fountain.

    • MR

      The kevlar liner for your above-ground swimming pool hasn’t come in yet?

  • Kivaari

    Has anyone, truly, shot another man while under water?

    • Graham2

      Not sure, the most effective under water weapons are of course sharks with frinkin’ laser beams attached to their heads!

      • Anton Gray Basson

        We only have sea bass.

        • CrossMe

          Are they ill-tempered?

          • Anton Gray Basson


          • MR

            Sure, sharks with freakin’ lasers on their heads get all the press, but ill-tempered sea bass are truly the workhorses of the underwater tactical world.

          • Anton Gray Basson

            Plus you get less hate mail from WWF and PETA.

  • Phil Elliott

    Don’t know about current weapons, but a late friend had a16 ga. shotgun that fired a harpoon, stick the bbl. underwater and fire it, was meant for Sharks.

    • Anonymoose

      One of my friends found an aluminum spear gun in perfect condition while diving in the Gulf.

  • Ghost

    If I wind up in water over my head, my immediate concern is drowning.

  • MR

    electrically fired
    What could go wrong?