Introduction: The K'nexecutioner 2.11 - "Cyclone"

Picture of The K'nexecutioner 2.11 - "Cyclone"

The long-awaited sequel to the original extra-heavy K'nex machine gun, Cyclone wipes the floor with its predecessor in every category - power, range, portability, versatility.

Designed to be the most powerful* K'nex fully-auto machine gun yet. Really - every single round of Cyclone's belt carries some decent strengh for a K'nex gun.

- If you have enough pieces, build two! It's one-handed.

- Unlike its picky predecessor, Cyclone has an open front and can use any size of rod for ammo. This includes flighted 'sniper' rounds.

Version History (updated):
2.0 - "Cyclone" first created but kept classified. Based off of the likewise-named weapon from Perfect Dark, it was powerful and fast-firing, but pitiful that only 17 of 19 barrels were usable.
2.1 - Extensive restructuring was necessary to make it fire from the top where barrels are further apart, instead of the side. This new layout is more compact.
2.11 - Significant improvement made to ammunition belt allowing for variable ammo sizes.

** Before you build: Know that not all K'nex motors are made equal. Some K'nex motors (at least a few of mine that I know for sure) are incapable of being used on the Cyclone because they too easily start clicking under too much load. Proceed if you are confident you have a good motor. Just a fair warning. **

*Hardest hitting, not fastest rpm.

Step 1: The Ammunition Belt

Picture of The Ammunition Belt

If you haven't the parts for the ammo belt, there'd be no point in continuing past this step, so let's get the tedious, hard, annoying, etc. part done first.

Find an efficient method for building them, else you'll be spending a lot of time on this step. (okay, it will take a long time regardless)

This step alone requires:
209 dark-grey connectors
209 blue spacers
57 grey spacers (each counts as 3 blue spacers)
57 black chain-links
57 red and light-grey connectors
.. among other things.

Use 2x type 64 rubber bands only! Too much power may result in broken K'nex pieces.

For simplicity's sake when attaching and removing the ammo belt, make sure that every black chain link is facing down.

Cyclone requires a specific number of barrels, unlike other open-belt machine guns. 19, to be exact. Get to it!

Step 2: Select Your Motor

Picture of Select Your Motor

Choices! This instructable branches apart two ways then comes back together, depending on which type of K'nex motor you have available. The two motors are attached differently.

Be sure that your motor is a strong one, else all this time may have been tragically wasted on a gun that refuses to turn.

If you have a classic-style clear/red (three hole) motor, proceed to step 3 and skip 4. Try to use a motor that doesn't click too easily under heavy load.

If you have a new-style bright-green Cyber Ultra motor (side-peg), you may skip step 3 and begin building 4 instead. This motor is highly reccomended for optimum performance.

Step 3: Front Section - Classic Motor

Picture of Front Section - Classic Motor

The front section is built in layers, from the front onto the back. The pictures show the layers being added on sequentially.

Step 4: Front End - Side-Peg Motor

Picture of Front End - Side-Peg Motor

This is the front end if you are using the side-peg style motors, which I do highly reccomend for power and RPM. It is built in sections from the front and moving back. Refer to the comments on the pictures.

If you have completed Step 3, skip this and move onto Step 5.

Step 5: Middle Section - Trigger Flipper

Picture of Middle Section - Trigger Flipper

This section is COMPLEX for a REASON - it has to be very sturdy.

Section by section, it is to be assembled together. I'm trying my hardest with pictures, and be sure to look into the comments left on each one.

Step 6: Rear Section - Handle and Elbow Rest

Picture of Rear Section - Handle and Elbow Rest

This section is refreshingly easy. Assemble.

Step 7: Assemble All Sections Into Cyclone

Picture of Assemble All Sections Into Cyclone

All sections should fit together nicely -- it should be apparent where they go. Double-check all connections to be sure there is nothing loose.

The belt is tricky to put on but not nearly as bad as the K'nexecutioner. Just keep sure that the gear chains are properly in the gears when attempting.

Step 8: Loading the Ammunition

Picture of Loading the Ammunition

Keep your fingers clear of the firing pin's pathway as you pull each back and set the triggers.

The funky things on the front of each barrel are for holding the rod in place. The white rod rotates so that the side of it tucks into the contour of the ammo. This gently holds it in place and releases when fired.


EpicMinecrafter870 (author)2015-02-13

this is the knex version of the XMG from call of duty

daredevil499 (author)2011-12-05

This is very awesome

cool knex13 (author)2011-11-19

Great but I do not have that much chains

Love to make it

gooldnoofgrin (author)2011-10-24

Absolutely amazing. A bit heavy though and the chain will only turn if you have a powerful motor but still great.

travw (author)2009-07-18

I know this is an old gun, but here's what I think: It's way too front heavy, and I had a problem with the elbow rest breaking off, it's pretty powerful and has a good range, but I would never, never use it in war.


Mace! (author)travw2009-07-25

Why wouldn't you use it in a k'nex war? If you want to use a machine gun then you would use this one.

DJ Radio (author)Mace!2009-08-13

The only reason I wouldnt use this in a knex war is the reload times.

Mace! (author)DJ Radio2009-08-22

So you would'nt use a machine gun period...........

DJ Radio (author)Mace!2009-08-22

If it doesnt require me to reload, I would use it. Otherwise, its a disposable gun.

Perfect Duck (author)DJ Radio2009-08-22

It's the opposite way of thinking for me, I see the reloading of machine guns as potential and not a drawback. Scenario: Say you have 19 shots. You fire 5. You have the time to load 2 more shots. You have 16 shots left and fire another 10 (perhaps too many), but an opposing player is outgunned and defeated. You use cover that you've gained to reload, and this time manage to reload 11 barrels, a few at a time. Now you've got 17 shots, etc. You have the ability to spend your idle time building up a very powerful multi-shot attack that you can use and dispense freely, and then once you're safe you're back to building up that potential again. The Cyclone is always ready to fire at moment's notice and you can easily take advantage of safe cover. Cyclone reloading is simple, you pull the pin back, the trigger for that individual pin will automatically set itself, then you reach to the front to slide a rod in, and set the holder and you're good. Reloading all 19 at a time would be cumbersome but doing it one, two at a time in the heat of a battle scenario could be easily pulled off. Hope that dispels a bit of your concern about reloading, but if you still think it takes too long, you're probably right because other K'nex weapons ARE easier to reload, I'll admit. The biggest competition are pump-actions.

Revan_Taros (author)Perfect Duck2011-01-09

or you could make extra chains.


DJ Radio (author)Perfect Duck2009-08-29

Im going to make a knex gun that has the ROF of the knexsayer, but has the fast reload times of my AR-4 v3. But yeah, your system does sound solid.

smattman22 (author)DJ Radio2009-09-07

how do i find or start a knex war?

travw (author)smattman222009-09-07

Go start a forum or something, don't be a dumb@$$ and ask on a random instructable.

smattman22 (author)travw2009-09-07


travw (author)smattman222009-09-08

How was that funny?

travw (author)DJ Radio2009-08-29

Well, actually, I can reload a Knexsayer faster than an AR-4 v3. Which is odd, considering AR-4 v3 holds less rounds than Knexsayer.

DJ Radio (author)travw2009-08-29

The newest version holds 1 more round than the knexsayer. The modded one has a 9 round hopper, which I think you have not seen....

travw (author)DJ Radio2009-08-29

Oh yeah, I forgot about the newest one. Sorry.

DJ Radio (author)travw2009-08-29

not to mention the fact that you can load up to 3 rounds in the hopper at once.

travw (author)DJ Radio2009-08-30

True... Didn't think about that.

DJ Radio (author)travw2009-08-30


Mace! (author)Perfect Duck2009-08-29

Exactly how I use it in a k'nex war.

hey man what u been up to? i love this gun

smilee (author)Knex Lego Maniac2009-08-27

Okay then I'll post it then thanks for you permission!

smilee (author)Knex Lego Maniac2009-08-26

I made instructions NOW post your tr8?

smilee (author)smilee2009-08-26

NOW can I post your tr8?

travw (author)DJ Radio2009-08-13

True, but if I did use it, I'd probably unload the whole thing, then switch to a different gun.

travw (author)Mace!2009-07-25

.....Because of what I said??? Maybe if it was mounted on some sort of rotating turret, but otherwise, the back portion breaks off and the whole thing plops to the ground... There were broken pieces everywhere!!1 Want that to happen in the middle of a battle?

Perfect Duck (author)travw2009-07-25

You must have built it incorrectly because the elbow rests hold true to their structure even when I swing it moderately into the load-bearing section. I wouldn't post anything that is prone to structural failure. As far as it being front-heavy, I also created a mod for it that gave extended structure out the front of it, providing another handle in the front far out enough so that it doesn't interfere with yellow rod sized ammo. I never posted that version, though.

I totally LOVE your guns.

travw (author)Perfect Duck2009-07-25

Ok, I don't wanna argue... Maybe I did make it wrong, but I already took it apart anyway. ('Cause I was down to about 10 dark grey connectors.) I'd love to see the one with two handles, if you still have it.

travw (author)travw2009-07-25

Also: I would much prefer Oodalump's Gatling Gun to this. It's much more powerful and sturdy.

erikos kostarikos (author)Mace!2009-08-20


KnexFreek (author)travw2009-09-23

UHHM mOuNt It !!!!

travw (author)KnexFreek2009-09-23

Ok, again, what's with ThE sTuPiD eVeRy OtHeR bEiNg A cApItAl ThInG?!? There's no point! Secondly, I posted that comment "Jul 18, 2009. 9:02 PM".

KnexFreek (author)travw2009-09-23

i like caps srry...

travw (author)KnexFreek2009-09-23

That's ok, it just makes it really hard to read. And, again, there's no point.
But we cool. =p

Revan_Taros (author)travw2011-01-09

looks like one of those gods-forsaken capchas (f***ing hat those things)

KnexFreek (author)travw2009-09-23


weadeadr (author)2011-03-13

i have the dulexe simple machine and another set that include about 1000 pieces and 8 more punds and i think i can build llike ten of them if i dont include the moters in 8 of them

weadeadr (author)2011-03-13

better than the one with twin belt(simple and seem easier to make and it looks light wieght

Fred the evil puppet (author)2011-02-22

and how much time exactly do you have on your hands?!?!
and to make two i mean holy s***!!!!!

derty123 (author)2010-09-10

pooor guy nooooooo liiifffffeeeeee

An Villain (author)derty1232010-12-17

Listen, at least he is an expert engineer (with K'nex) you just randomly favorite Instructables and fail at spelling.

Perfect Duck (author)derty1232010-09-10

You're totally right. It's 2010 and I posted this back in 2007. Think of all the things I could have done... I should get back into K'nex since it's a great hobby.

You should get back in not just because it's fun, but also because there aren't enough people out there as good at it as you are.

Jesus. (author)2010-03-31

Can I use this motor?

jmm72 (author)Jesus.2010-09-03

where did u get that motor

About This Instructable




More by Perfect Duck:K'nex Dual Pistol setThe K'nexecutioner 2.11 - "Cyclone"The K'nexecutioner 1.02
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