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Knex guns Answered

Hey guys, I'm starting to run out
of ideas for Knex guns. If you could leave me some guns I could build in the comments, it would be appreciated. Also concepts are welcome as well. Thanks!

Discussions

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The Knex Inventor
The Knex Inventor

2 months ago

Hey man, are you still building guns? I remember 3 years ago when everyone was active. Seems like the community died since then, kinda sad. Would be awesome to get everyone's contact info so we could keep in touch and maybe build some stuff.

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Insaneknexguyisback
Insaneknexguyisback

Reply 11 days ago

I’m still active Been here since 2009 just forgot my account password but I’ve got a few builds going on pm me I’ll show you my m21 ebr I’m building

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TheDunkis
TheDunkis

5 years ago

I believe there are plenty of ideas left out there, they're just getting more complicated. Here's one of the simpler things we lack a decent amount of: repeating shotguns. Figure out a nice, convenient to use repeating shotgun. The only examples I'm aware of are still a bit annoying to use in how you reload them. Perhaps come up with a removable magazine?

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Lucas The Boss
Lucas The Boss

Reply 5 years ago

Thanks, I'll try that later. About 5 minutes after I posted this I had a idea for a full auto mech. I can't be live nobody's thought of this yet but I'm working on it right now and so far it shoots 9 rounds controllably and rapidly. It shoots all nine rounds in less than 5 seconds.

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TheDunkis
TheDunkis

Reply 5 years ago

If that's true, that's good to hear. But how did you do it? There are only so many ways you can make a fully automatic mechanism. I came up with the idea of a fired round actuating the trigger similar to a real firearm's gas system years ago but could never find a trigger mechanism that worked well enough. I would love to see the concept finally working. Otherwise, I'm curious what you else you could have possibly done.

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Lucas The Boss
Lucas The Boss

Reply 5 years ago

well I took a similar mech like what myommy used and simplified it (he made it to complicated) so the trigger holds the first band which is a normal true trigger and when pulled releases the first band, it hits a lever and goes back to the ratchet which hold the other 8 bands. It has a normal semi auto mech that only lets one slot by. It is released and hits the lever since the trigger is still pulled and hits the lever again. When you release the trigger it goes back up and blocks the next band from hitting the lever. In still trying to slow down the fire rate so it can hit all the bullets out of a mag. It only shoots about 3 because so many bands are going the mag has a hard time pushing another bullet up in time for the next band.

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TheDunkis
TheDunkis

Reply 5 years ago

Alright, sounds like an idea we've already thought up. Just that you're finally implementing it successfully. The trigger is quite brilliant and simple though. The simplest idea to slow it down would be to lengthen the gun if possible. The rubber band would have to travel farther before hitting the lever. Another idea would be to increase the weight of the piston that actuates the cog. Then it'd accelerate a little slower and give a satisfying recoil feeling to the gun. Finally, I'd just band up the mag pusher very tightly so that it loads as fast as possible. I'm excited to see your mechanism. I've been waiting for a successful implementation for years now.

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CorgiCritter
CorgiCritter

Reply 5 years ago

Looks like something BM would build with all those cut parts. But at least you understand it, I have no idea whats going on with it.

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TheDunkis
TheDunkis

Reply 5 years ago

It's really not as complicated as it looks. Just imagine your standard repeating slingshot i.e. a weapon that keeps several bands on a cog so each trigger pull releases one rubber band. Now imagine that instead of pulling the trigger manually, a fired rubber band pulls the trigger for you. So each time a shot is fired, another shot is fired after, and so on. So normally, after the first shot is fired, it'd just continue firing until all shots go off. The real trigger simply blocks and holds a single band before it can continue firing unless it's held down.

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he110w0r1d
he110w0r1d

Reply 5 months ago

how do you make a repeting slingshot?

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TheDunkis
TheDunkis

Reply 5 months ago

Depends what you mean. I used repeating when I meant semi-automatic (one trigger pull = one shot). A manually operated slingshot that has a magazine is also considered a repeater. I've seen designs that use a pump to push the bands back, but I don't know how to find them.

If you mean a semi-auto, and if you want a real example, check out my page and look for one of my first instructions titled MP44. It's not a great build by today's standards, but it demonstrates one way to build a repeating slingshot. You could probably find a better example but I don't know any offhand.

The way it works, one of the simplest ways to design one is with a rotating cog and a ratcheting sear assembly similar in concept to an escapement: https://upload.wikimedia.org/wikipedia/commons/2/2... . Basically, you load a rubber band on each peg of the cog. The trigger controls how the cog rotates allowing a single band to be released per trigger pull. The simplest way this is done is by having two pegs as part of the trigger sear. One of the cog pegs catches on the first peg of the trigger. Pulling the trigger unblocks the cog peg from the first trigger peg, but then it catches on the second. Letting the trigger go unblocks the cog peg from the second trigger peg, and then the next cog peg is blocked by the first trigger peg, starting the process over. Another way to look at this is like an air lock. Only one "door" can be open at any given time to prevent all of the "air" from rushing out, and the trigger controls which "door" is open.

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he110w0r1d
he110w0r1d

Reply 5 months ago

I meant something like a rifle-ish thing that has decent range- I'm thinking about 20 meters, and doesn't use that many pieces because I've only got a medium orange container. Can you think of anything?

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TheDunkis
TheDunkis

Reply 5 months ago

Sorry, not sure what to recommend you since most rifle-ish lengthed builds require a good handful of pieces. You could try my BAW. Again, not a high quality build, but it was one of my larger ones back when I was fairly limited in pieces too.

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he110w0r1d
he110w0r1d

Reply 5 months ago

BAW? I can't find it on your projects page? Unless you mean the barracuda, which I can't make because I only have 2 black y clips

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TheDunkis
TheDunkis

Reply 5 months ago

My apologies, I forgot that I didn't post the instructions for that one. If you only have 2 black y clips, you wouldn't be able to build it anyway. I'm not sure what other good builds there are with no y clips required.

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he110w0r1d
he110w0r1d

Reply 5 months ago

Thanks for your help. I might make a thin rifle that fits on a white rod, so 3 connectors wide, and it would have a blue detachable mag, and on long parts i would use big grey rods.

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Lucas The Boss
Lucas The Boss

Reply 5 months ago

If your trying to get into building knex guns and carrying on the hobby we all loved, I would highly recommend purchasing some bulk pieces off eBay for fairly cheap. Green rods, yellow connectors, and loads of y clips will go a long way. Tons of older instructions on simple cog repeaters out there, you just need those pesky little pieces that weren't very common in building sets.

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CorgiCritter
CorgiCritter

Reply 5 years ago

Thanks, it makes a little more sense now. The problem I see, is that if you use connector ammo, you would run out of ammo very quickly.

Then again, I believe the Mac 10 runs out of ammo in one or two seconds in full auto.

In my mind, it would be more practical to work on semi automatics that don't have a 15 pound trigger pull or look awful. (Knex semi automatics often end up being basically double action revolvers, which bugs me when people call them semi automatics, but at least people know what you mean when you say that.)

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TheDunkis
TheDunkis

Reply 5 years ago

Indeed. I know it wouldn't be practical as a war weapon by any means, but it'd be a pretty cool concept once its refined. At least for the K'nex ammo portion, removable magazines wouldn't be all that difficult. The rubber bands would be another problem entirely. I mean, I don't even know how many rubber bands a good mechanism could hold. If you imagine it, I'd like having at least 8 fully stretched #64s across a weapon. But 8 isn't all too many shots, but that is a lot of stress on one area of a weapon with moving parts.

Well the problem with semi autos is that energy has to come from somewhere. My preference is to charge shots beforehand instead of on the spot because you get far better range. The challenge then is making it convenient to prepare those shots.

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Lucas The Boss
Lucas The Boss

Reply 5 years ago

I got a vid up of it working, I just uploaded a firing demo so it'll be up soon. I don't know if this link will work so if it didn't then copy and paste it into your search browser.

https://youtu.be/6KNPKUGJhCs

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TheDunkis
TheDunkis

Reply 5 years ago

Very nice. Again, I think all you'd have to do is push the lever toward the front of the gun and extend the piston to it to slow down the RoF to something manageable. Of course, this is with the intention of actually firing K'nex. I'll try my hand with it when I can.

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Lucas The Boss
Lucas The Boss

Reply 5 years ago

here's the other link

http://youtu.be/44q76Wc44Mw

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CorgiCritter
CorgiCritter

Reply 5 years ago

It would be cool. I guess removable mags could help with the problem.

True.

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Kona-chan
Kona-chan

Reply 5 years ago

and how does this work?

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TheDunkis
TheDunkis

Reply 5 years ago

Check out my reply a little further down to Corgi, I explained the mechanism to him.

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TheDunkis
TheDunkis

Reply 5 years ago

Holy cut pieces galore. But yeah man, you could easily slow down the RoF if you put the lever waaaaaay in front and run a piston between it and the mechanism. Maybe I'll try my hand again.

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myOmy
myOmy

Reply 5 years ago

I have had a completely different mech built for a while, but my darn iPad wont upload the videos to youtube. I'll try again

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TheDunkis
TheDunkis

Reply 5 years ago

Do show me when you can. I think I remember you mentioning it a while ago but I don't recall if you showed it at all. I'm eager to refine the concept if you couldn't tell.

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myOmy
myOmy

Reply 5 years ago

New forum topic is up. Youtube decided to stop being a B****

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myOmy
myOmy

Reply 5 years ago

lol

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Kona-chan
Kona-chan

5 years ago

I keep saying this people

CMMG, MK47, Mutant

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sonic broom
sonic broom

5 years ago

Make a Pump action rail gun. Or one of the Tracking Point guns