Introduction: RMConstruction's Knex Minigun, V2.0

Picture of RMConstruction's Knex Minigun, V2.0

Hi all. i have been studying the vast collecion of minigun pics availible on the net, and the collection of knex miniguns. I believe this is and will be the 1st Knex Minigun instructable (not slideshow). I wanted to make it as realistic as possible, but realised that wasn't 100% possible. Actual Minigun barells are only connecred at one point, but with knex, you would need two points. I took this into account, and eventually decided to connect the handle and barell, which gave a firm base to add the main 'shell' of the gun. If your still reading this, you're probably getting bored. Let's get into pros and cons before ya' decide to just skip.....

Top handle
Angled back handle (comfortable)
Octapod... aka stand... (not tripod, is an octagon)
Shoots from a chain

Octapod pivot sometimes snaps (rarely, but happens)
Range varies

Ok. Were ready to start. This is a heck of a project!

Step 1: Firing System

Picture of Firing System

Building the 'boxy thing that goes on the side'
The chain puller basically...

Step 2: Odds N' Ends

Picture of Odds N' Ends

Some lil' thigs before we get to the complicated part.

Step 3: Main Shell

Picture of Main Shell

The main section of the gun, which pretty much holds it all together.

Step 4: Main Arm/support Thingy. Do I Say Thingy Too Much?!?!?!?

Picture of Main Arm/support Thingy. Do I Say Thingy Too Much?!?!?!?

The support arm, connecting the handle with the barrel end. Features a lot of repeating repeating repeating repeating repeating repeating repeating repeating patterns patterns patterns patterns patterns patterns......

Step 5: Back Handle

Picture of Back Handle

The back handle & arm assembly.

Step 6: Barell

Picture of Barell

The barell, fairly simple.

Step 7: Main Gun Assembly

Picture of Main Gun Assembly

The assembly of the parts you've made already. No, I havent forgotten the chain or Octapod.

Step 8: Chain

Picture of Chain

Well done! You've completed the main gun! Now for the Chain... And loading....

Step 9: Octapod

Picture of Octapod

Stand for the whole thing. I call it an Octapod as the base is an octagon.

Step 10: COMPLETE!!!!!!!!

Picture of COMPLETE!!!!!!!!

Well done! you now have a knex minigun to wreak havoc with! MWUHAHAHAHAHAHAHA!!!!


plumeri1 (author)2014-01-01

The main shell is confusing me,how many segments do you make?

poo2thegeek (author)2010-06-04

hey can i have a part list??????

jackatronix (author)poo2thegeek2011-04-01

Yeh and me, it is quite confusing when there is no list of parts etc, but other than that it is freaking awesome!!!!!!!

peterson4 (author)jackatronix2011-04-04

I like pie

JJ8090 (author)peterson42011-12-25

pie is awesome

Puddock (author)2011-12-04

Oh no. I now have a huge temptation to build this.

wwhitt (author)2011-10-12

Hey can somebody post a firing video and a part list??

RMConstruction (author)wwhitt2011-10-13

Doubt either are possible...

Torpe (author)2011-08-02

How many green rods does it use?

bighead5454 (author)2011-07-21

great gun, fun to use, but the octopod is flimsy and keeps breaking on me-probably something i did wrong, but besides that, its awesome

Thanks :) I used Cyber K'nex for added strength on the Octopod...

hey, i have a problem with it
although you have scrapped it already, i was thinking you may be able to help

when i put in a chain loaded and everything, it only fire the first three or so shots before the chain comes off the gear
i removed the wheel and it helped a little bit, but did you eery have this problem when you had the gun?

Does it fall into the gun or out of it? If it's out, the motor may be struggling to pull the weight and will jog the gears in its efforts. Try changing the batteries, or ger a blender ;)

If it's into the gun, the last couple of shots usually fall through without the motor's help because of the weight.

sorry, but nevermind, i hadnt put enough lead for the chain to get a good grip (i only have about a foot of chain) so it was just coming off

thanks for replying tho

wow, just asking for help then figuring out what was wrong after you replied, trying to help makes me feel terrible

well, thanks i guess
(i cant really say anything without seeming like a jerk)


it just falls off the gear, towards the front of the gun even when it is held out straight or supported by a table

i found that a slower motor actually helped, but not much

kwintisolo12234 (author)2011-03-12

can you add a video to see how it shoots?

Do you know how old this 'ible is?!

jackojack12 (author)2011-03-02

Could u build it with one cog?


and why not use a green connector instead

me too

RMConstruction (author)2010-12-16

Look at the pictures. Would help if you were more specific!

RMConstruction (author)2010-12-16

The handle.

RMConstruction (author)2010-12-14

Oh? How did it turn out? Did it fire well?

MandH (author)2010-11-29

Pretty Nice. I like how you did not fancy it all up like a lot of K'nex builders do. I think it just wastes time to make it fancy.

ryry2011 (author)2010-11-27

what does it fire

x-treme (author)2010-11-22

This is amazing!

Even though I don't have enough pieces to build it, If I did, I defiantly would make it!
I'll try to make a smaller version of it and post it.


RMConstruction (author)x-treme2010-11-22

There are many guns that use the same mechanism. Supapoopa recently posted his take on it I think.

(YOUR N (author)2010-11-22

luv it

RMConstruction (author)(YOUR N2010-11-22


RMConstruction (author)2010-11-14

Sorry, Its been gone almost a year :p

RMConstruction (author)2010-11-14

Nope. Thanks!

ninjakoi (author)2010-09-09

you have really have made my day, thanks for making the gun and posting.

you rule

RMConstruction (author)ninjakoi2010-09-10

Haha. Thanks!

ninjakoi (author)2010-09-10

on picture 3 are the black things on the white circles those little green rods?

RMConstruction (author)ninjakoi2010-09-10

Sure are :-)

knex1111111111 (author)2010-08-27

Cool gun. I made it and it is very fun to use. Just one thing. Arent miniguns supposed to be small

Haha. No. You're thinking of mini gun

Oh. Okay. Thanks.

AgentCWG (author)2010-07-18

Is it possible to build this without the whopping long bit on the bottom? I don't hav emany yellow connectors left.

RMConstruction (author)AgentCWG2010-07-21

Yes, actually. I'll get you a link to somebody else's mod, because of the same reason.

bighead5454 (author)2010-07-20

can i use your firing system for a gun im making?

redroo90 (author)2009-08-10

I don't have that motor,so im going to try useing a different one. i will tell u if it works.

RMConstruction (author)redroo902009-08-10

OK :) Good luck!

hey if you took off the barrels, rigged some gears to another cyberknex motor, and rigged up the motion sensor you may be able to make an Auto-turret

stubbopolis (author)redroo902010-06-19

im going to too

GeekBeam (author)2010-05-02

on dimembering a connector: not gonna matter for me, I broke one of those white pieces by accident. 8/

poo2thegeek (author)2010-02-18

how the hell do you make knex mini guns....

how does it fire at speed?

smattman22 (author)2010-02-13

how big is it?


About This Instructable




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