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Bulgarian Key Chain Gun Parts
Weaponeer Forums : Blueprints and Drawings

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  Chainmail

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Posted: July 25 2014 at 7:01am | IP Logged Quote Chainmail

A disassembled Bulgarian Key Chain Gun.

It is so simple, even a non engineer like myself can see how it works!

It looks like it would be a bitch to assemble though.

B9Z1F_Key_Chain_Gun_Parts.pdf
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  Paraquat

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Posted: July 25 2014 at 8:17am | IP Logged Quote Paraquat

Does the button on the upper left (I'm assuming a trigger) depress both pins at once? Or does it act as a "safety" latching onto the disk on the lower right?

Nifty.
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  gjohnsoniv

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Posted: July 25 2014 at 12:14pm | IP Logged Quote gjohnsoniv

I feel like that might be a release to separate the halves? Are the two rods with holes and springs (between the halves) the triggers?
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  UKBiker

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Posted: July 25 2014 at 4:26pm | IP Logged Quote UKBiker

I think it is cocked by pulling back the ringed piece drawing back the two strikers, which are then locked by the two button pieces with small springs on them, depressing the button will line up the hole allowing the striker to be propelled forwards through it by the spring behind the strikers, the guide rods on the cocking piece keeps them lined up.
I think the larger button on the second piece allows the two parts to be slid together on the dovetail after loading, and then by pushing the button forwards allows the two parts to be separated to remove the spent shells and reload both chambers.
So you have independent firing of each chamber by simply pushing each of the two smaller buttons.
There appears to be no safety but when the thing is assembled prior to cocking the two strikers although in contact with the primers don't look to have anything that could force them forwards if it was dropped so it's probably safe enough to carry loaded.
A nice neat little self defence piece for up close and personal last resort actions.
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  Chainmail

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Posted: July 25 2014 at 9:55pm | IP Logged Quote Chainmail

UKBiker is correct with how this weapon works.

For what it is worth, this type of weapon fires .32 caliber cartridges, and are typically made from brass. They also appear to be "over engineered" for what they actually fire.

My understanding is that these weapons started out as secret service and espionage weapons back in the cold war era, and when the various Soviet regimes fell those who had the weapons and the blueprints for the weapons began selling them to criminals and civilians to make ends meet.

Weapons of this type have been made by criminals in many countries, including Great Britain and even ones as far afield as Australia.

Minimal machinery is needed to make these weapons. Just what you would expect for a weapon made in Soviet Bulgaria.

This video from Australia shows a law enforecement officer using a Bulgarian type key chain gun. I tried to get this to link using the link function, but it didn't work for some reason.

https://www.youtube.com/watch?v=gPa0wMY8Qq4
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  backbencher

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Posted: July 26 2014 at 1:15am | IP Logged Quote backbencher

http://www.youtube.com/watch?v=gPa0wMY8Qq4

Have to type the codes in yourself.

Bracketurlbrackethttp://www.thisismylink.combracket/urlbrack et
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  Chainmail

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Posted: July 26 2014 at 6:17am | IP Logged Quote Chainmail

Thanks!
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  Paraquat

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Posted: July 28 2014 at 1:16pm | IP Logged Quote Paraquat

So the firing pins are hollow to suit the dowel pins on the right hand cocking mechanism?
Then the center spring must be powerful enough to overcome the two firing pin springs?
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  UKBiker

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Posted: July 28 2014 at 2:42pm | IP Logged Quote UKBiker

As you pull back on the ring to cock the gun the brim of the centre piece engages with the brims of the strikers, once cocked the spring on the centre piece returns it to the bottom so that when fired the brims of the strikers don't contact the cocking piece brim.
When it is cocked the striker comes back through the trigger plungers and the spring on the plungers pushes them up locking the strikers in the cocked position
When you depress the trigger plungers the hole lines up allowing the striker to be pushed through contacting the primer when both are fired the brims of the strikers are almost in contact with the brim on the centre cocking piece which then pulls back the strikers as you re cock the weapon.

This is how I think it all works from studying the pictures of the parts. The trigger plungers cannot come out as the striker is passed through it when fired and when cocked the spring pushes the plunger upwards but it cannot come out because the pin part of the striker is still inside the plunger with the wider part resting on the back of it holding the striker springs in compression ready to push it forward when the plunger is depressed and lining the holes up again so the striker can pass through it.

It's quite a simple solution and easily strippable for cleaning etc
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  Chainmail

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Posted: July 29 2014 at 7:26am | IP Logged Quote Chainmail

You are correct with your assessment on how the weapon works UKBiker.
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  Paraquat

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Posted: July 29 2014 at 8:07am | IP Logged Quote Paraquat

Ahh. That's where I was losing it...
I assumed the center nub was strictly to keep the spring captive. I didn't make the connection that it's dual purpose and that it pulls down the firing pins.
I still think it's nifty.

Thanks UK, and thanks Chainmail.
Shame it's illegal here.
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  backbencher

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Posted: July 29 2014 at 11:22am | IP Logged Quote backbencher

As built, it would be an illegal zip gun in Texas.  Think we'd have to add sights, maybe a flashlight rail to get it out of the zip gun category.  A flashlight on your keychain's pretty handy, right?  
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  northumbrian

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Posted: July 29 2014 at 1:56pm | IP Logged Quote northumbrian

Very, very groovy.

Perfect for .22LR I think.

Thanks for this one Chainmail
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  UKBiker

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Posted: July 30 2014 at 7:59am | IP Logged Quote UKBiker

northumbrian wrote:
Very, very groovy.

Perfect for .22LR I think.

Thanks for this one Chainmail


I was thinking of scaling it up to use .50BMG, not for any particular ballistics advantage over .22LR, mainly because it would stop me losing my keys ever again
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  Paraquat

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Posted: July 30 2014 at 1:05pm | IP Logged Quote Paraquat

UKBiker wrote:
northumbrian wrote:
Very, very groovy.

Perfect for .22LR I think.

Thanks for this one Chainmail


I was thinking of scaling it up to use .50BMG, not for any particular ballistics advantage over .22LR, mainly because it would stop me losing my keys ever again


At what point does it stop being classified as a zip gun and start being classified as a cannon?
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  UKBiker

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Posted: July 30 2014 at 1:40pm | IP Logged Quote UKBiker

Paraquat wrote:

UKBiker wrote:
northumbrian wrote:
Very, very groovy.
<br>
<br>Perfect for .22LR I think.
<br>
<br>Thanks for this one Chainmail

<br>
<br>I was thinking of scaling it up to use .50BMG, not for any particular ballistics advantage over .22LR, mainly because it would stop me losing my keys ever again
<br><br>At what point does it stop being classified as a zip gun and start being classified as a cannon?


When the key ring that holds your car keys has to be towed behind the car. 88mm ammo anyone?
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  buflow

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Posted: August 02 2014 at 1:08am | IP Logged Quote buflow

How is this un cocked wilthout firing? May need to spend some time with a bit of brass and try to have one of these. Prints or drawings anywhere?
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  Mech warrior

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Posted: August 02 2014 at 11:11pm | IP Logged Quote Mech warrior

Paraquat wrote: At what point does it stop being classified as a zip gun and start being classified as a cannon?

I think that if the primer, powder, and projectile were not all self contained in 1 unit, it could at least be a legal black powder set up.
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  UKBiker

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Posted: August 03 2014 at 5:49am | IP Logged Quote UKBiker

It would be fairly easy to convert to black powder. you could even have several "barrel" sections all loaded with primer, powder, and ball and then just slide them onto the firing pin section.
It would be pretty much the same as a cap and ball chamber arrangement as the revolvers use.
But in a two shot which slides onto the firing pin half
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  Chainmail

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Posted: August 06 2014 at 2:18am | IP Logged Quote Chainmail

I was just thinking, why have the two reciever ends slide apart when you can simply have them connected by a pin and have them rotate to expose the chambers for loading?

Something similar to this would work well.


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