Pribor-3B bullpup nordenfelt gun

[Cutaway]

http://img299.imageshack.us/img299/1073/pribor3bnordenfeltgun1xc7.jpg

http://img242.imageshack.us/img242/4376/pribor3bnordenfeltgun2du1.jpg

http://img120.imageshack.us/img120/7962/pribor3bnordenfeltgun3tf5.jpg

http://img242.imageshack.us/img242/8461/pribor3bnordenfeltgun4rj3.jpg

Man-portable nordenfelt gun of the Soviet era that apparently provided 'near minigun' performance by combining the ROF but to be suitable for a soldier to handle. It uses the 7.62x39 round but the ammo supply was limited as the weapon is magazine fed.

The Pribor 3B still worked but was also quite hard to control due to the recoil force, Cartridge ejection is downwards BEHIND the magazine area as the weapon uses a gas/recoil operaton similar to that used in the AN94 Abakan assault rifle currently used by Russian special forces. Another variant of the Pribor-3B was made from AKM smilar parts to ease production. The Pribor-3B would be more practical as a tripod mounted machine gun if its possible to make a belt feed device for it.

[crazywhiteguy]

That is a very fine looking gun. Its something I would love to own if i could find a legal version of it. I looked on google and haven't been able to find mechanism drawings or patents for it. I'm interested in seeing how the mechanism works to use all three barrels.

[festergrump]

A wild, bastardized, tri-barreled, bullpup AKM... umm... type of gun. I'm dumbfounded.

Need Links and sources, please. This is WAY cool!

[EDIT: Looking more closely at the pictures, it would seem to me to have only one bolt carrier, judging by the higher bump on the top of the dust cover/gas tube (if that's indeed what it is on top) which the charging handle pokes through. This leads me to believe it fires all three barrels simultaneously. Very strange.]

[486]

There also only appears to be 1 gas tube, that's what it seems to be, I don't understand a gas/recoil system, so I'm just assuming, also, another one of the same guy's creations appears to have a Bakelite receiver...

http://www.militaryimages.net/photopost/data/531/Bullpup.JPG

[festergrump]

...it would seem to me to have only one bolt carrier, judging by the higher bump on the top of the dust cover/gas tube (if that's indeed what it is on top)
There also only appears to be 1 gas tube, that's what it seems to be, I don't understand a gas/recoil system, so I'm just assuming...

The gas expanding from the fired round is expelled through a port in the barrel(s) after the projectile(s) leave the barrel and moves the bolt carrier (thus also the bolt) back to reset the hammer for another go at a fresh round. Therefore the gas tube and the gas-piston which is attached to the bolt carrier are one in the same so far as space goes, as one fits inside the other.

This one picture intrigues me. It shows full on the fact that there is a protrusion under the barrels as well as over the top of them. The lower one I now suspect to carry a heavy duty spring to handle the load of three 7.62X39 rounds firing simultaneously but how would the bolt(s) work unless I am completely wrong and the bolt carrier is also underneath and the charging handle is obscurely fit somehow between or around the carrier within the receiver?

There had better be a cutaway drawing of this receiver in the future or I will surely go insane!

The bakelite receiver ideas are cool but I worry about how long they might last. This whole thread brings up myths which need much explaining...

[486]

The bakelite receiver ideas are cool but I worry about how long they might last. This whole thread brings up myths which need much explaining...

With like an AR lower receiver there is almost no stress on it, and some are made of a polymer, ant the stock and buffer tube are integral, It's on the cav-arms site http://www.cavalryarms.com/MKII.html
Though the bakelite one may have a sheetmetal insert in it , as it would be very brittle and probably wouldn't take the shock of firing. That gun is under the 3 barrel ones in the pictures Cutaway posted, and a insert seems to be seen in the ejection port receiver cross-section

On the 3 barrel one, I thought that the protrusion under the barrels was the gas tube/ cylinder [probably is gas piston operation, like the AK, FAL, and, AR-18] because the top one doesn't look like it could hold even a gas tube with the charging handle there [the gas tube on an AR-15 gets very hot, it would heat up the metal charging handle to hand searing temperatures quickly]. Straight recoil action wouldn't work, it has a very tapered case, and gas would leak everywhere, I think the recoil part of gas/recoil operation was added in translation...

Also it only bears resemblance to the nordenfelt gun in that it has multiple barrels, the nordenfelt is a weird lever action/trigger design. Look it up in wikipedia, or it was in a issue of shotgun news, forget which one though.

[486]

I found more info on the bakelite receiver rifle here, if anyone's interested. http://world.guns.ru/assault/as94-e.htm
[Sorry for such a short post, and double post, I would have edited it into my previous post, but since it's an old post, I need to make a new one. So please don't ban me. :p]

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Double posting is fine as long as there is a bit of time between the posts. It's only a crime when someone makes several posts in the same thread in rapid succession (usually <12 hours).

-Hinckleyforpresident

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Thanks, I'll keep that in mind.

EDIT: The weapon appears to have the forerunner of the F2000 forward ejection system, this is really interesting, FN took an old Russian idea, and may have claimed it as their own. The article also confirms my suspicion of a metal liner in the receiver. [Actually, now that I think of it, the first picture in this thread has 2 plastic weapons, the one on the bottom has a ejection port on the side, and the one on top is the one I was originally talking about...]