How to Make a Great K'nex Weapon Instructable

 by Mepain
C:\Documents and Settings\ANDREA BENDER\My Documents\My Pictures\Copy-of-KNEX-10-001-01.jpg

So You Want to Contribute?


Ever since around September 2006, K'nex weaponry has occupied Instructables, and has been growing rapidly ever since. If you're having trouble figuring out what to post for your Instructable, take a look here, maybe you'll get a few ideas.

Before contributing to the site, please consider the following:
-The first thing you should do before contributing your first Instructable is that you should skim around the site a little. You should get used to the way the site works and comment a little, get to know some people.
-Check out this guided tour of Instructables to help you get started.
-You should ask around for ideas on how to make a great gun.
-Make some simple guns, and work your way up. A great starter K'nex gun would be KILLERK's K'nex gun.
 
 
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Step 1: Start building!

The first step you should do when starting to build is to organize your pieces, so you can easily get to them and so you can see how many you have.

Now that you have all your parts sorted out and ready to go, you can start making the gun.

Let's start with the basic mechanisms of any K'nex gun. All K'nex guns have one thing in common, they use rubber bands or springs (or any other objects that have a lot of potential energy) to push or pull a projectile out of a barrel or off of a track. In most guns, a firing pin or plunger is pulled back and blocked by a "block trigger." A block trigger is a mechanism that blocks the firing when pulled back, thus storing a lot of potential energy in the firing pin. When the trigger is pulled, the projectile is shot out of the barrel or off of the track.

Another kind of firing method uses the same principle, but the firing pin itself is shot out of the barrel or off of the track. This method is most commonly used in crossbow designs, but some K'nex crossbows use string rather than rubber bands and depend on the flexible arms for their power.
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GeekBeam says: May 8, 2012. 2:26 PM
I've got organizers too! they are so extremely useful! especially when you have the curse of not being able to find what your looking for, but finding what you will need next and throing it away...
The Red Book of Westmarch in reply to GeekBeamOct 18, 2012. 12:32 PM
lol, I know right!
slipknoman5 says: Jul 29, 2010. 6:53 PM
where did u get all the knex i cant find any where to get it
knexsuperbuilderfreak in reply to slipknoman5Nov 12, 2011. 5:07 AM
ebay
zap8005 says: Oct 21, 2011. 9:44 PM
what's that sniper-looking gun on top?
knex maddo says: Oct 24, 2008. 5:37 AM
my mum won't let me buy any more knex she says iv'e got enough!!!:(
jonathanmi in reply to knex maddoJul 17, 2011. 6:27 AM
Me too :(
H1T4TCH1 in reply to knex maddoAug 10, 2010. 8:34 AM
*laughs* what kind of mom do you have? the devil!? xD and how old are you? xD *laughs*
BalintRules in reply to knex maddoAug 6, 2010. 3:09 AM
same here
DELETED_Haon in reply to knex maddoFeb 28, 2010. 8:46 AM
(removed by author or community request)
iamdab in reply to DELETED_HaonSep 29, 2010. 10:59 AM
mine too
amtdude in reply to iamdabDec 20, 2010. 7:59 PM
i second that motion
slipknoman5 says: Jul 29, 2010. 6:54 PM
in england
NatNoBrains in reply to slipknoman5Feb 8, 2011. 10:42 AM
Ebay.
knexinventer says: Jun 16, 2011. 6:28 PM
damn
Hitman227 says: Nov 18, 2010. 4:02 AM
Dude! Looks like you have a chaingun going there!
flamely says: Jan 29, 2008. 11:50 AM
i have an idea in my head for a great barrel i made it but shoots only 30 ft but from 30 ft i was able to hit a can so it is accurate but how do i strengthen the barrel note: the barrel i made has hardly any friction also i cant put pic bc i cant find a camera atm
Sketch98 in reply to flamelyJul 17, 2010. 5:16 PM
more rubber bands, thicker/stronger rubber bands, etc.
mchammerman says: May 5, 2010. 8:29 AM
you have tons of knex and the knex guns look awesome

 
knexsniper1 says: Mar 11, 2009. 1:25 PM
I created a trigger that you pull, and then you release it to set off the firing pin
grozz in reply to knexsniper1Mar 29, 2010. 3:13 PM
Let me guess...

You attached the trigger to the back of the firing pin.
XD

knexsniper1 in reply to knexsniper1Mar 11, 2009. 1:54 PM
Not sure if it was my own creation or someone elses, but just thought id put the idea out. :)
barrax in reply to knexsniper1Mar 20, 2009. 2:42 PM
thats called a repeater.
grozz in reply to barraxMar 29, 2010. 3:15 PM
A repeater is a type of gun that has a handle on a pivot under the trigger that you push forward and back to load a bullet into the chamber...
barrax in reply to grozzMar 29, 2010. 11:56 PM
that was a year ago when i said that...
knexsniper1 in reply to barraxApr 3, 2009. 3:54 PM
why? you still pull back the ram.
barrax in reply to knexsniper1Apr 4, 2009. 12:22 AM
oops. sorry, if it shoots every shot then it is a repeater.
JesseHughes says: Jan 28, 2010. 7:46 PM
I had a bolt action gun that held 5 shots and used a true trigger/magazine system, but my friend sat on it and broke it :( I'll try to recreate it. That's where my scope came from (if you check out my channel)
RhinoKnexArmorments in reply to JesseHughesFeb 21, 2010. 9:12 AM
 That isn't a good gun. Everyone besides beginners have block triggers. And a bolt pistol have been done too many times. If you wanna have a good gun you should stop taking cred for other guns and start building your own.
poo2thegeek says: Feb 15, 2010. 12:07 PM
 wheres that inferno thing.I want to see how big it is but the links broken!
NYPA says: Oct 23, 2009. 8:59 PM
You have a lot of time on your hands...
Whaleman in reply to NYPADec 29, 2009. 1:23 PM
As opposed to who? You? Five people made this instructable. I spent about five minutes writing and about ten minutes photographing/uploading for the part I did. Some of the other steps used pictures that were already on the interweb, so those took even less time.
 
NYPA in reply to WhalemanDec 29, 2009. 1:54 PM
I meant the guns.
Lowney in reply to NYPANov 7, 2009. 4:06 PM
Says the war log guy
NYPA in reply to LowneyNov 8, 2009. 9:55 AM
That takes 10 minutes.
Lowney in reply to NYPANov 8, 2009. 10:27 AM
10x3=30 minutes.
If you make 1 a week until 2010 that's (4x10)x2=80
30+80=110

So you will spend 1 hour and 50 minutes writing your logs.

Therefore:
Mepain's free time<NYPA's free time.

VICTORY!
DJ Radio in reply to LowneyNov 9, 2009. 4:33 PM
How do you know Mepain's free time?
Lowney in reply to DJ RadioNov 9, 2009. 11:56 PM
<Mysterious voice>
We can only assume...
dirtnap in reply to LowneyDec 10, 2009. 8:22 AM
Lol Yall have to much free time on your hands to calculate other peoples free time. LMFAO
Knexwizard says: Nov 28, 2009. 6:03 PM
I was thinkng of making a cool knex gun that has a sight a removavle mag and a true trigger. I have started building today and i will tell u it has not been good i am having trouble with the trigger mech.This helped me a lot with the gun thnks. This is going to be my best knex gun ever. I am not sure what kind of gun it is so i called it a EX-25.(I thought is sounded cool)
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