Introduction: Plasmaspy's Knex Compound Bow

Picture of Plasmaspy's Knex Compound Bow

heres my compound bow! its very sturdy and fun to play with!
building is pretty simple just stare at the pictures, most of its completely symmetrical anyway. =]

peice count=

cons =

yellow = 20
green = 20
white = 23
red = 14
orange = 12
grey single slot = 8
y clips = 6

rods =

green = 60
white = 48
blue = 14
red = 8
grey or black longs = 8
yellow = 2

misc =

blue spacers = 36
wheels = 2

Step 1: Stock

Picture of Stock

this is the stock or handle of the bow. most of it is symmetrical.

Step 2: Limb Connecters

Picture of Limb Connecters

the parts that connect the limbs to the stock. the most important part.

Step 3: Limbs

Picture of Limbs

the limbs of the bow. i would recommed either using all grey rods for more power. dont mix black rods with grey rods cos it will make it deform.

Step 4: Limb Wheels

Picture of Limb Wheels

the pulley system wheels at the end of the limbs.

Step 5: Arrow Guide

Picture of Arrow Guide

the arrow guide and string separater. i would recommend using wooden kebab sticks for the arrows instead of grey/black rods.

Step 6: The Bow String

Picture of The Bow String

this part will tell you about the bow string. have alook back at the arrow guide pictures to see the positioning of the string on the the arrow guide.


hrishi4040 (author)2016-04-13

Dude I am SICK of this bow. It is very good to make it but the only prob with it is the range:| I think u should extend the white connector part for its shooting range bro !

Still I like the Design and the HEAVY middle piece! :D

agu2 (author)2014-06-16

Darn I'm torn between whether to make your bow or Matrixtechnicians one, they both look so awesome but unfortunately I don't have the time (nor am I sure if I have enough pieces) to build both.

parshan (author)2013-11-11

Heavyweight Champion!!!

SuperSlay3r (author)2012-08-31

Dude. I Only have one thing to Say. FTW!!! 5 Stars Bro :D Nice Job!

Derpancakes (author)2010-10-20

Wow! I wanted to get a compoun bow but didn't want to spend hundreds of dollars. I saw this and built it, and lightly modded it. It has a great design and construction! *****

plasmaspy (author)Derpancakes2010-10-20

thanks! glad you like it :D

Derpancakes (author)plasmaspy2010-10-30

I just added a sight, and also added some extra support to the arms.

plasmaspy (author)Derpancakes2010-11-15

cool! any pictures?

antonk (author)2008-07-07

is it worth making

plasmaspy (author)antonk2008-07-08


bubba j (author)plasmaspy2009-06-01

yes totaly but i dont have enogh knex :.-( but how mutch is it axle to axle???

TheKnexNoob (author)bubba j2010-10-24

lol. Indian Priest. Yes, I know, I'm nearly 2 years late.

knex_mepalm (author)plasmaspy2009-08-11

there is a whole lot of tension!

apples!!!!! (author)antonk2008-07-07

I think so. Yes.

olibogger (author)2010-06-06

i built it today added a pin sight shoots amazingly far i used wood dowels

plasmaspy (author)olibogger2010-06-30


Decon93 (author)2010-03-27

i built this and modded it to have more strength on the arms of the bow and it works pretty well the only problem is the bands sometimes move out of center causing an innacurate shot. by the way i also removed the column of white connectors and so now i fire sharpened dowel rods out of it although its not very accurate like that but still very powerful it makes big dents in my back fence wen fired from about 15 feet away

knexfreak95 (author)2009-12-26

 only problem is it doesn't have a cam

ILIKEPIE333 (author)2009-05-29

looks very good! 4.5*s because of the instructions (a little incomplete, just take it apart!) what's the range?

erikos kostarikos (author)2009-02-20

i like the bow but the instructions...they sucks. these are just pictures from the parts.

yup except 1. i couldnt be bothered to take it apart 2. you dont need better instructions you can build it easyily from these pictures. 3.baaka!

Trogador (author)2008-08-05

If it's not too bothersome, could you possibly add in a piece count?

plasmaspy (author)Trogador2008-08-08

yeah il try also im gonna a part to this show how to turn it into a force multiplying power bow. its way more powerful than this one.

DrWeird117 (author)plasmaspy2009-01-23


Trogador (author)plasmaspy2008-08-08

Wow... thanks! That's a pretty small amount of pieces; I'm definitely going to have to build this :D

plasmaspy (author)Trogador2008-08-09

ty! =]

DJ Radio (author)2008-11-15

You did a better job than I did, except on the grip:

seansippo (author)2008-10-28

looking at this the most trouble im probably going to have is the rubber bands. could i possible get a little more detail on the number of bands needed, there length, and how to connect them together? im liking the idea of having a composit bow that i can play with without much worry, like my real one : ).

seansippo (author)seansippo2008-10-29

ok now i am noticing a little trouble understanding the connection in the very middle of the stock with the orange piece and the green pieces.

arrow shot (author)2008-10-09

i havent seen this bow on the website until you said you made 1 on ltcheesecracker's bow. Nice design, shouldnt break much... i can never make a bow that has a good sturdiness

pls (author)2008-10-08

i love the look, may make this:)

plasmaspy (author)pls2008-10-08

ty =p

tecrogue (author)2008-10-02

I know you posted this a few months back now, but is there any way we could get a photo of the middle section of the stock? I'm having trouble making out what all is there, and how things fit. Thanks!

jollex (author)2008-09-21

This is awesome! I built it but I changed the arrow guide because I didn't like yours. For arrows I use two wooden BBQ skewers taped together.

aleigh45 (author)2008-09-06

I'd like to see an Instructable on how to make a real compound bow out of wood or something.

amtdude (author)2008-08-12

what type of arows do u use

plasmaspy (author)amtdude2008-08-13

i use the wooden bbq skewers that you can buy at super markets and stuff. =]

Onii (author)2008-07-31

Haha, this bow is freaking awesome. You did an awesome job on the limbs. This is my version of it.

Trainman 2001 (author)Onii2008-08-11

thats beast

plasmaspy (author)Onii2008-07-31

nice! =D

apples!!!!! (author)2008-07-02

hmmm..i want to build! do you get you rubberbands from a rubberband ball? cause they look like the ones i use.

plasmaspy (author)apples!!!!!2008-07-02

yeah!! i got my band ball from woolworths! =]

flames10391 (author)plasmaspy2008-07-03

We used to have those in New Jersey when i was a wee tot but now they are all gone :( r.i.p. woolworths

are not they have it at staples and target and all over the place

lol yeah i got mine from target

im talking about the store, not the rubber band ball :P

apples!!!!! (author)plasmaspy2008-07-03

i think we have the same bandball then =) and nice job on the bow. i wish i could build but i dont have enough gray rods :S

plasmaspy (author)apples!!!!!2008-07-03

: /

apples!!!!! (author)plasmaspy2008-07-07

yay i built it! working on stringing it though....

plasmaspy (author)apples!!!!!2008-07-08

just make the string then connect the the end flapping bits to thye blue rod that goes through the wheel. then follow the next picture, following the string around to the other blue rod.

About This Instructable




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