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Shotgun design (constructive criticism welcome!) Answered

Alright, this is my new shotgun design.  I have been working on it since I decided to get back into K'nex, however, right now I don't have the pieces to build it, so it will remain a concept for now.  It includes a horizontal magazine that I have designed, a pump, and TD's ram.  The ammo will feed into a mechanism similar to that on the zkar, pushing it upward so that it rests on a pusher which is located right below the barrel.  This pusher is externally connected to the rod in the front and is held in the forward position by a rubber band.  When the pump is pulled back, the ram is cocked, and the loading ram is moves back as well, placing the ammo right below the barrel.  When the pump is pushed forward, it pushes the loading ram forward, loading the ammo into the barrel.  

Though this model is not proportionate, I think it accurately gets the idea across, and I was hoping you could give me feedback as to what could be wrong with the design, or you can just feel free to tell me how much you love it.  Eventually I plan on adding a stock that houses a bullpup sling mech, using the guide on the ram to act as a pusher for the rear BTS of the sling gun.  

I am pretty sure I can pull this off, but I need the pieces first, so feel free to test this concept out and let me know what you think.  Thanks.

-Kinetic 

* note in the key it says that the green circles are protruding rods, this is a mistake and the blue circles are actually the protruding rods

Tags:knexgun

25 Replies

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agent harmsy (author)2011-01-15

If you lived in Melbourne, I'd gladly let you borrow my K'nex :(
SO MANY GOOD IDEAS!

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BALLISTA (author)2010-11-03

A picture of it would be nice. >_>

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~KGB~ (author)2010-10-20
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Kinetic (author)~KGB~2010-10-20

Yeah, and it is going to require an odd layout in terms of the layers because a pump will have to fit smoothly over it (at least for the barrel). It also is going to need several ball joint sockets, which I have none of. It looks good on paper, but it may turn out being too tough a build.

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TheFoofinator (author)Kinetic2010-10-21

Use a wider pump- not all the guns have to be 5 layers!

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Kinetic (author)TheFoofinator2010-10-21

This one does because it has to house 3 bullets side by side.

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~KGB~ (author)Kinetic2010-10-20

kk, that happens to me, i think its gonna work but it doesnt lol

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Kinetic (author)~KGB~2010-10-20

Ugh yeah I hate that. Just keep trying and thinking.

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~KGB~ (author)Kinetic2010-10-21
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MegaMetal8 (author)2010-10-22

If you pull it off

It will be amazing

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altair ibn la ahad (author)2010-10-22

make a slug shotgun ment for range at first and then mod it to shoot three. also your make is feeding the wrong way it needs to feed towards the trigger. and scrap your mech, still use the dunkis' ram just make ist so when you move the pump it loads a shell ( this must be done after cocking the ram or els the bullet will get caught on th feeding lever)
i have done this but with a plain ram but it only got like 12 ft but with the dunkis' rail ram it should shoot farther. hope u use this info to advantage.

peace out cyborgold1

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oodalumps (author)2010-10-21

Is it a shotgun, or just a tubular magazine with a pump?

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Kinetic (author)oodalumps2010-10-21

The magazine is 5 layers thick, housing 3 layers of ammo. It feeds 3 at a time.

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mettaurlover (author)2010-10-20

In theory, tube mags are great. In practice, they're a pain in the butt to make work properly, though this may be a better way to make it work if you can figure it out.

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Kinetic (author)mettaurlover2010-10-20

Well right now I have one that feeds quite well with an internal pusher, but a problem I think I could have is that a second bullet may interfere with the feeding mech, keeping the ammo above it from being pushed up properly.

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mettaurlover (author)Kinetic2010-10-20

Exactly. You may end up having to use rod ammo in this, which would actually work better than connectors due to not catching.

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Kinetic (author)mettaurlover2010-10-20

Aren't rods more prone to catching?

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mettaurlover (author)Kinetic2010-10-20

Only in a traditional mag-a tube makes it so that the grooves never align with each other, and therefore cannot catch.

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Kinetic (author)mettaurlover2010-10-20

Yeah i know what you mean, but there is a point at which the rods are stacked, though it may not make much difference. I'l try both.

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mettaurlover (author)Kinetic2010-10-20

Well, in this case it shouldn't matter, but you'll probably have problems with the pump jamming constantly due to the ammo pushing its way into the place it's supposed to go into.

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sukinmaru (author)2010-10-20

It might be prone to jamming if you use that magazine.
Also with that kind of pressure on your trigger system, it MAY break it.
It looks like a good idea, try building it from your plans first before making alterations :)

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Kinetic (author)sukinmaru2010-10-20

Well, part of the point of making this gun is to include a horizontal mag, so I plan on making that the primary focus of its development. If this idea doesn't work, there are so many other ways out there waiting to be discovered. As for the trigger, I think it will work if I can use as few pieces in it as possible, giving it few stress points. Thanks for the feedback.

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sukinmaru (author)Kinetic2010-10-20

I do like the horizontal mag idea, but rod ammo may work a bit better.

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