Introduction: K'NEX Handgun / Pistol

A very easy to build K'NEX gun using only basic pieces and rubberbands that is surprisingly strong and extremely powerful. This may be a toy but it is much more powerful than your average dart gun so be careful with it.

Build time: ~10-15min
Distance: estimated at 70-80ft (this has not been tested nor have I put the maximum amount of rubberbands on the gun)

Pieces needed:
Connectors:
  • 11 white
  • 7 yellow
  • 6-7 green
  • 8 reds
  • 1 light gray
  • 2 dark gray
  • 1 orange
Rods
  • 2 blue
  • 19 white
  • 34 green

Firing Pin
  • 1 black rod (length of gray rod but stronger)
  • 1 white rod
  • 1 orange connector
  • 1 tan clip

Non-K'NEX parts
  • black tape (aka electrical insulation tape)
  • rubberbands (I got mine from the Hobby Lobby, they're made to hold the wing on a model plane, but I'm sure the broccoli bands would work)

Step 1: Barrel

These are the parts for the barrel, first build the three layers then attach together at every indicated spot. It may be easier to just build the center portion then attach each white piece one by one.

One additional thing, there is a green piece connected in the center at the spot marked (0), this piece is not require but it really helps to keep the firing pin from jumping out of the track when it is cocked. I also wrapped this one rod in black tape to help keep it in nice and tight.

Step 2: Firing Mechanism

I've provided multiple pictures so it can be more easily constructed. Just connect the catch to the trigger with a white connector and hinge it all on a second white connector. Also note that I wrapped the trigger in black tape; this is highly suggested to reinforce the trigger.

Don't forget the rubberband to hold the firing mechanism down until the trigger is pulled.

Step 3: Grip & Finishing Touches

First, clip four (4) white rods into one (1) white piece as shown in the first photo. Then attach pieces to each side of the white connector as shown so you have a three piece wide grip.

OK, now slide the grip onto the bottom of the barrel as shown in the second photo and secure with a green rod on each side. Then slide a white rod though where indicated; you will have to flex the grip backwards a bit and the rod won't clip in but the flexed grip actually holds the rod in place nicely.

Now, just wrap your rubberbands around the yellow clip (which one depends on your rubberbands) and put in the blue rod at the back to help secure the firing pin.

How did I make my firing pin? with a black rod (same as gray rod but stronger) with a tan clip on it, a white rod with a orange clip, and plenty of black tape...there are much better firing pins out there so I recommend you find one (just search "K'NEX Gun") rather than use mine...

Well, as soon as you have the firing pin in with the rubberbands wrapped around it, just drop a yellow rod into the top of the barrel, cock it, aim and fire away.

ojochris has built a magazine with this gun that doesn't jam https://www.instructables.com/id/Knex-Magazine/?ALLSTEPS

I may add some additional add-ons, such as a proper firing rod and a fieldlight (in the works) if I am so inclined.

Looks kinda like a Beretta, eh?

Comments

author
CallumC2 made it!(author)2016-04-01

some old chat

author
FoxPirate1987 made it!(author)2016-03-22

Cool

author
mom123 made it!(author)2011-05-14

how do you make a magizine for this gun

author
jaghead+96 made it!(author)2007-12-01

Coud I use this trigger system in my single-shot sniper rifle. Please respond soon so I can post it.

author
jaghead+96 made it!(author)2007-12-05

Cool! Thanx but I have a couple of problems. 1. I took the gun apart. 2. I didn't take a pic of it. and 3. I dont know How to send pics to people.

author
mom123 made it!(author)2011-05-14

niether do i

author
mom123 made it!(author)2011-05-14

probably

author
Alathald made it!(author)2007-12-05

Yes everyone should feel free to modify and/or use any part of this gun, the whole reason I posted it is so it could inspire others...just send me a link so I can check yours out!

author
Russian5000 made it!(author)2009-05-15

Nice gun!

author
zap8004 made it!(author)2011-03-19

yeh, its real easy and cool

author
deadaccount made it!(author)2010-11-30

black rods are super strong grey rods used for gears and liek the motor things,
Same reason why some red rods are tan

author
creat0r made it!(author)2010-09-04

I only have 1 black rod in all of my liek... 1000 knex...

author
Dbowker made it!(author)2010-01-19

How does the black rod play in??????????????

author
Dbowker made it!(author)2010-01-19

How do the rubber bands go on?

author
Dbowker made it!(author)2010-01-19

Sweet!!

author
mnm4123 made it!(author)2009-09-07

i don't get how to make the firing pin. could you take some close up pictures of that?

author
ryuk13 made it!(author)2008-11-28

awesome gun! i love how easy it is to mod. i added dual hoppers to the top of the gun.

author
ryuk13 made it!(author)2008-11-30

here's a pic of the mods i have made

Photo 17.jpg
author
Millawi+Legend made it!(author)2008-12-22

does that have two magazines?

author
ryuk13 made it!(author)2009-01-11

sure does

author
Russianbomb made it!(author)2009-01-24

your gun is soooooo. AAAAAAAAAAAWWWWWWWWWSSSSSSSSSOOOOOOO MMMMMMMMMMEEEEEEEEEEE. i like the dual mags. ALOT

author
cstrike+pwner made it!(author)2009-02-26

WHats the point of two mags?

author
Russianbomb made it!(author)2009-04-03

idk. but it looks cool

author
ericm247 made it!(author)2009-06-21

Nope, not to me. Don't you think it looks a little on the bulky side?

author
Russianbomb made it!(author)2009-08-31

probably

author
ryuk13 made it!(author)2009-08-31

its actually not that heavy, and the dual mags let me shoot two different types of k'nex

author
Raz1r+Knex+Bull3t made it!(author)2009-07-01

nice improvements, i also modded to the gun i made better iron sights, made the gun look more compact, and a better true trigger.

author
Raz1r+Knex+Bull3t made it!(author)2009-07-01

also the gun just with 2 thin rubberbands on mine will pierce a box with a gray head i tried it it hit the box and it bounced all the way back and nearly hit my head now bear in mind the gray piece is very dull on the tip.

author
DJ+Radio made it!(author)2009-08-01

Hey, I know you probably arent on anymore, but I just wanted to drop by. This was the second knex gun I ever made, and I loved it. It was pretty inspiring. 5*

author
cstrike+pwner made it!(author)2007-12-15

i modded it to have a bullet lock and a better look. It's a shotgun i would show a pic but i don't know how. It put a hole in my pvc potato cannon!!!!!!

author
Raz1r+Knex+Bull3t made it!(author)2009-07-01

potato cannon!!!!! i just got a book on how to make one out of pvc and other stuff like a tennis ball mortar. AND YES I KNOW IM LATE ON THIS COMMENT IT GETS ANNOYING WHEN PEOPLE KEEP SENDING ME REPLYS THAT IM LATE ON A COMMENT!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

author
Alathald made it!(author)2007-12-29

Sounds cool, wouldn't mind seeing a pic...It's pretty simple, just click the reply button, then the "add images" button then at the bottom it will say "Upload Images / Files", just click on the "Browse..." button and find the picture on your computer and click "Open". Then click "upload" and the pic will upload. After that, just post your comment and your pic will be at the bottom of the post. OK, maybe it's not that simple, guess I'll have to make a new instructable :-D

author
cstrike+pwner made it!(author)2008-01-06

I modded it to be a assult rifle it shoots through card board (realy thick) from 20ft. Unsharpened but sharpened VERY LITTLE. My shotgun mod is my picture. :) It also has safety from breaking rubber bands! Easy way of showing you.

author
cstrike+pwner made it!(author)2008-01-01

I hope it works. Here it is. BTW thanks.

author
cstrike+pwner made it!(author)2008-01-01

It didn't work.

author
yebo made it!(author)2008-04-08

http://www.hotmail.comis this a rubberband gun ?

author
gilbertbishop made it!(author)2009-04-19

no, it fires knex

author
Raz1r+Knex+Bull3t made it!(author)2009-06-30

awsome gun! :)

author
tahirhh made it!(author)2009-05-29

I added a detachable mag to the bottom of this, it's pretty cool and works well too. I'll post it if any1 wants me to. BTW it doesn't use any fancy parts like y connectors or ball joints or anything like that.

author
Rhino25 made it!(author)2009-03-28

I built the instructable but the pin keeps going over the bullet I put into it. I also modded it by on the back of the pin in front of the tape a rubber band. It silences it and makes it so you don't need tape because it absorbs the shock.

author
tahirhh made it!(author)2009-02-20

please, please, please, post it!!!

author
cstrike+pwner made it!(author)2009-02-26

It wasn't good any way

author
cstrike+pwner made it!(author)2009-02-20

Sry i broke it =(

author
awsome made it!(author)2008-05-12

omg! so many people have posted this same gun!

author
Alathald made it!(author)2008-05-12

Sorry? I did a bit of looking before I posted it to be sure it wasn't already posted but I didn't see anything like it... Got any links to one like this that were posted before this one was? I guess what I mean by "like this" is either the grip or the trigger (as ghetto as the trigger is :-P )

author
awsome made it!(author)2008-05-13

https://www.instructables.com/id/knex-gun_20/?comments=all#CBTP3DRFFX2RCDY
this guns handel is pretty much the same and so is the "barrel"

author
Millawi+Legend made it!(author)2008-12-22

thats tomboyrme's gun.

author
Millawi+Legend made it!(author)2009-02-19

and it looks nothing like it so shut it!

author
Trogador made it!(author)2008-08-17

To be brutally honest, that doesn't look too much like this one.

author
awsome made it!(author)2008-05-13

whoops! sorry! i thought the date on that one was 2007 not 2008. But still, the guy on that site copied it from somebody from youtube (pretty much a carbon copy).

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