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All About Guns What's your weapon of choice, and why? Discuss the beloved speargun here!

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Old 04-02-2014, 02:08 PM   #1
spearq8
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Interesting!

I didn't realize that an underwater handgun make by H&K existed! Also a Russian assault AK47 type underwater rifle shooting a bunch of darts in full auto?!! Anyone see these in action in real life? How cool is that!

http://foxtrotalpha.jalopnik.com/scu...ate-1555684620
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Old 04-02-2014, 06:59 PM   #2
popgun pete
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Re: Interesting!

These guns get "rediscovered" every couple of years, you are but the latest to do so. Cavitation stabilized ammo in the form of darts takes very high gun power to generate the cavitation sheath around the projectile for initial high velocity and linear flight. Energy is drained from the underwater projectile very quickly, so kill range is extended, but not by a huge amount. A gun carrying longer energy retaining projectiles like spears would be an unsuitable assault weapon. A bad jam in the barrel and the gun blows up, so barrels tend to be short (or they soon will be).

One thing we tend to forget is that stored spear energy after departure from the muzzle is used to tow the shooting line to the target. This is why 3/8" and larger diameter spear shafts were favored in the past as they often hauled stainless steel cable towards a defiant victim staring at the diver while wondering what this impudent intruder was doing on his patch.

A historical note (4/01/2014) recalled by A. Grouper (retired): "We soon found out that the glass-eyed Cyclops with the black skins and yellow stripe markings were bad news and were in fact the dreaded double-ended squids that could jettison their harpooning arms and then miraculously reattach them or swap them with those of their fellow double-ended squids. After the double-ended squids visited an area the number of "vacancy" and "to let" signs always increased dramatically. We have had it easier once they stopped using the big bubble and loud noise generating harpooning arms which we sometimes found abandoned on the bottom. The double-ended squids have fortunately long since switched their attentions to the homeless wanderers passing through our locality."
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Old 04-02-2014, 08:13 PM   #3
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Re: Interesting!

Come again?

Quote:
A historical note (4/01/2014) recalled by A. Grouper (retired): "We soon found out that the glass-eyed Cyclops with the black skins and yellow stripe markings were bad news and were in fact the dreaded double-ended squids that could jettison their harpooning arms and then miraculously reattach them or swap them with those of their fellow double-ended squids. After the double-ended squids visited an area the number of "vacancy" and "to let" signs always increased dramatically. We have had it easier once they stopped using the big bubble and loud noise generating harpooning arms which we sometimes found abandoned on the bottom. The double-ended squids have fortunately long since switched their attentions to the homeless wanderers passing through our locality."
I feel like I just entered The Twilight Zone.

Besides the quoted post, interesting information!
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Old 04-02-2014, 10:00 PM   #4
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Re: Interesting!

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Originally Posted by Marcus View Post
Come again?



I feel like I just entered The Twilight Zone.

Besides the quoted post, interesting information!
Note the date!
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Old 04-02-2014, 10:36 PM   #5
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Re: Interesting!

On a more serious note here is the MBA Gyrojet underwater rocket ammo gun. Only a few prototype pistols made. Here are two of them and the ammo type used for various guns.
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Old 04-03-2014, 12:32 AM   #6
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Re: Interesting!

Can you buy these guns? Not that I would want to shoot fish with them, but they would certainly be interesting to have and shoot every once in a while!
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Old 04-03-2014, 02:49 AM   #7
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Re: Interesting!

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Originally Posted by spearq8 View Post
Can you buy these guns? Not that I would want to shoot fish with them, but they would certainly be interesting to have and shoot every once in a while!
Collector's items at a stratospheric price I expect, I have been told that there are only three in existence, but I don't know if that is true and I found the reference years ago. The terrestrial versions of the rocket rifles were used in one of the James Bond movies, I think the one where the enormous tanker with the opening bow doors swallows the submarines. There is probably a reference to it on Wikipedia.

I just checked, it was "You Only Live Twice", had a similar mass shootout with an armoured citadel where the baddies were being charged by the good guys lead by "our hero".

Last edited by popgun pete; 04-03-2014 at 02:59 AM. Reason: typo, more info
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Old 04-04-2014, 03:49 PM   #8
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Re: Interesting!

The underwater Gyrojet in action: http://iaaforum.org/forum3/viewtopic.php?f=8&t=10671

This marine rocket pistol was called the "Lancejet". Unequal drive from the rocket nozzles could steer the spear projectile off course, the multiple rocket outlets being used to spin stabilize the missile in air for linear powered flight to the target. In water the system should have used a single rocket outlet for axial drive and then used some asymmetrical angled faces on the spear tip to spin the shaft instead.
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Old 01-18-2019, 03:24 PM   #9
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Re: Interesting!

While looking for an old post I found this MBA Gyrojet Survival kit for the pistol, so you could obtain one of these and ammo, but at a very high price! Looks pretty cool though. An offshoot of the KABOOM school of spearfishing, once dominated by the Tapmatic SMG.
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