Introduction: Knex Rapid Fire Grabber Gun

Picture of Knex Rapid Fire Grabber Gun

I was wondering what to do for a new knex gun so i turned to the make books, and there I found a Knex Claw Grabber so i began to build it but instead of making the claw i added a barrel, my new loading system and a magazine and to my surprise i could shoot very quickly, so i modified it slightly and i made this. you can fire it fast from the hip or aim from the shoulder, you fire it by pulling the handle right back and then releasing it with your fingers spread as below.
i know it isnt finished but i wanted to just get it published.

Step 1: Handle

Picture of Handle

Follow the instructions on the pictures.

Step 2: Handle Continued

Picture of Handle Continued

After you have made the main part of the handle in the first step you will want to strengthen it as it will bend as it is.

1. Take 2 green connectors and attach them to a red rod.
2. Clip 4 orange connectors to a red rod as in the picture, then add 2 yellow rods to 2 of the the connectors and then to white rods with a grey spacers on to the other 2.
3&4. Clip a tan connector and 2 blue spacers on to a blue rod and attach it to the rest of the handle.
5. Connect the strengthener to the handle.

Step 3: Main Body

Picture of Main Body

1,2,3. clip a purple connector to a blue one and then clip a blue rod on to the blue connector and clip that to 2 purples as in the picture. then put 2 green connectors on to each side of the purples with a green rod. then clip 2 red connectors to the blue connector with green rods and add green and white rods to each red connector.(make 2)

Step 4: Connecting

Picture of Connecting

Read the pictures.

Step 5: Magazine, Loading System and Barrel

Picture of Magazine, Loading System and Barrel


Step 6: Firing Pin

Picture of Firing Pin


Step 7: Extras-Handle

Picture of Extras-Handle

how the make the handle to fit the red rods.
once you have made the handle, clip 3 yellow connectors to a white rod and put that on to the red rods as in the pictures below. once it is on you can slide some spacers on too to keep it in place.


An Villain (author)2009-09-22

this is truly awesome, 5*.

TARDISToby (author)2009-04-03

U joined on my birthday!

d4rksaber (author)TARDISToby2009-09-18

you're kicked from the party*

mettaurlover (author)2008-08-23

how do you fire? maybe you culd ad id

You pull back and then release the handle.

Basically this is semi auto


Basically this is semi auto

No, it has no trigger as such, just a handle which you release.

yeah but every time you pull it back and let go it fires here example

That one is semi-auto, you pull back the 'trigger' and it releases the pin but on this gun you have to release the pin.

Ok its slightly off but it falls under the same category,

acker123 (author)2007-07-07

im gonna make a knex turret! i will hav a base with motor in and then a remote control so i can move the main gun on top. i will probs use a gatling on top or design a new mg! im new so if i make it, it will b my first instructable yeah!!!! acker123

dynno97 (author)acker1232009-02-17

seems inmpossible, but go for it anyways

darth acexxacer (author)acker1232007-10-20

wat u should do is mount a knexacutioner on top

as your main gun

the 1.02

sharpshooter12 (author)2008-05-02

pretty cool. looks sorta like a p-90

Reiben (author)sharpshooter122008-05-30

rofl wtf? no way its a f-n

pls (author)2008-04-15

nice idea.

eddy14777 (author)2008-03-18

this gun sucks .................................................................................................................................................

YEs IT DoEs, ReAllY.

what is the firing rate?

It is as fast as you can pull back and then release the ram but I can do 25r in 10 seconds.

popomaster (author)2007-12-31

I made a wii zapper, check it out!


LOL, good for you.

knexster (author)2007-07-03

This looks awesome and i love the barrel design not a tan piece to be found. But i think you should build a better support system for it because i built it and i just fell over and broke. I like the idea but for some reason everytime i hear "grabber-gun" i always think it grabs the bullet or something. So could you post the original version like the thing that grabbed stuff and stuff. LOL long post

sure ill post the grabber

Easy Button (author)Easy Button2007-05-13

it uses your magazine idea thanks for the idea

Easy Button (author)2007-05-05

no offense but this gun is weak it only shoots like 10-15ft

yeah it does, but it was not designed for power it is for speed

well if u add a rubber band it goes a little farther and it jams sometimes

yeah that is because of the side of the mag if it was 1 unit smaller the rods wouldnt move but now they jam so i put in a rod stabliser as in the 4 photo above. to make it clip a green rod to the end yellow and clip a grey rod to the middle, then attach a white to the end of the grey.

ok now it doesnt jam as much

yeah it doesnt totally solve the problem but it helps

Darth Trainman (author)2007-04-17

This is possibly the closest we will get to true automatic guns. if we just modify the Gun, not the idea, we can gewte a VERY good gun...

Kaiven (author)Darth Trainman2007-04-19

actually, there is oodalumps chain gun. that thing is fully automatic.

Darth Trainman (author)Kaiven2007-04-21

but you have to reload it after you shoot... here you just have to put in rods.

Kaiven (author)Darth Trainman2007-04-21

acctually, you just put rods in red impact too. and if you ter off the ammo seperater, it still works fine

Mad Cat (author)Kaiven2007-04-27


oodalumps (author)Darth Trainman2007-04-21

I made a "true automatic" similar to the first two guns i posted. it doesn't require you to laod separate bullets, just load it and turn on the motor. It was weak though, only shot 8 feet; so i didn't bother posting it.

did you take a pic of it?

No. I might if I can get my hands on a camera.

just steal one

Mad Cat (author)oodalumps2007-04-22

I'm interested!

Mad Cat (author)Darth Trainman2007-04-18

I wouldn't say that... It's probably close to semi-auto, but the tank thingy that Perfect Duck created IS a true fully auto.

Darth Trainman (author)Mad Cat2007-04-18

ah yes, but remeber- it sucked.

About This Instructable




Bio: I'm in my final year of Product Design at uni so I don't have as much time for tinkering as I'd like ... More »
More by Loosewire; SOE Operative:Covert Spy Cigarettes!Waddle Bot - K'nex BipedK'nex Semi-Auto Revolver
Add instructable to: