Picture of K'nex Chu-ko-nu/Repeating Crossbow
The Chu-ko-nu was created around 181-234 A.D. by chinese strategist Zhuge Liang. I have recreated his invention out of k'nex. I know that there are other repeating crossbows on this site, but i believe that this is the first instructable for a Chu-ko-nu style repeating crossbow. Here are some basic stats about my weapon:

Range: 30-40 feet. This is moderate range and I know most crossbows can shoot farther than this, but it is pretty good for the type of crossbow i think.

Magazine holds 9 red rods. But it only shoots 8 of them. The last one usually falls out because there is no pressure holding it in, but sometimes you may get lucky.

Power: It is not very powerful, but with a sharpened rod, you can get it to stick in cardboard

Piece count: (To make sure you have all of the pieces) Also if you do not have enough and would like to know other ways, please post on this instructable or pm me, i will be glad to help.

Rods: stock+bow+lever+magazine=total
green: 35 + 2 + 10 + 68 = 115
white: 44 + 58 + 6 + 67 = 175
blue: 44 + 23 + 4 + 16 = 87
yellow: 8 + 68 + 0 + 3 = 79
red: 11 + 0 + 8 + 0 = 19
gray: 0 + 0 + 4 + 0 = 4

Connectors: stock+bow+lever+magazine=total
gray: 36 + 18 + 10 + 26 = 90
light gray: 0 + 0 + 2 + 6 = 8
orange: 9 + 0 + 0 + 37 = 46
red: 8 + 6 + 0 + 5 = 19
green: 8 + 18 + 4 + 30 = 60
yellow: 22 + 54 + 6 + 36 = 118
white: 8 + 20 + 2 + 5 = 35
purple: 40 + 0 + 2 + 8 = 50
blue: 1 + 0 + 2 + 0 = 3

Misc: stock+bow+lever+magazine=total
blue spacers: 4 + 0 + 0 + 16 = 20
small wheels: 0 + 2 + 0 + 2 = 4
rubber bands: (this depends on the size) I used 4
duct tape

Uses a total of 932 pieces. As you can see, the magazine uses lots of small rods, so it will be complicated. Lets start with that to get it out of the way.

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jackson98822 years ago
im in the middle of building it and then I ran out of pieces. this sucks :(
jackson98822 years ago
I have to make that
pic 16 in mag part 3 is so blurry
not the first but its the first true chu-ko-nu ive seen
false. i had one out before this but i deleted the slideshow because i wanted theb" post the gun at christmas. ( we all know i delete all my slideshows hahaha) also mine actually works!! lol.
i know but look at the date and this does work to
DJ Radio5 years ago
Looks cool! Ima go make a bottom loaded repeating crossbow where all you have to do is pull the string back and fire now. 5*
lol then a year later there are a couple of those haha ^^
Good luck
bryoda (author) 5 years ago
 I just started working on a better version. I fixed the first 2 problems in step 10 so they almost never occur. Im currently working on a better mag that wont jam. 
KnexFreek5 years ago

check mine out!!!!!! 
TigerNod5 years ago
Very innovative, I like it! 5.0.
slientbob5 years ago
Hey bryoda can you put up a video or a picture showing what the crossbow did to that box to show the destruction capacities
AmoTelus5 years ago
I like the list of parts (and the design), but there's something missing...

# of purple connectors?
bryoda (author)  AmoTelus5 years ago
 Oops, i accidentaly put those as brown connectors, ill change that
This is great!! A knex first.

NO its not. Check out my slideshow called some of my new guns. And look at the post date

But this one looks and works like a real one.

so does my NEW one on my new slideshow (some of my new guns) Check it out.

bryoda (author)  Killer~SafeCracker5 years ago
Thanks! my one friend gave me the idea, he heard that i build k'nex guns and he mentioned this to me. I looked it up and thought it would be great to make from k'nex. Before too long i think there will be a flawless version of this
Will you be working on this more? I'll build it if you make it flawless.
No gun is flawless.
*Work extremely smoothly.
Thats better.
I changed my mind, I won't be building.
bryoda (author)  Oblivitus5 years ago
 I've been working on it for a bit, and i cant get the magazine to work flawlessly, i've fixed all the other problems, but the magazine still gets jammed about once every 10 shots. So i've sort of given up on it for now
Have you identified the cause of the jamming?
hey is there any way i could replace the wheels? Because the only ones i have are slightly to big

bryoda (author)  tubanator-2.05 years ago
 On the magazine, you probably could replace those with white connectors, i haven't tried it, but i think it would work. On the bow, you can just remove the wheels and wrap the rubber bands around the blue rods.
ferrari4845 years ago
Looks cool just like a Chinese crossbow.
Um.....That's what it is.
Duh, it IS a chinese crossbow.
Mr. Muggle5 years ago
btw 5 stars
Mr. Muggle5 years ago
THAT THING LOOKS AWESOME,  i'm going to build it right after my current project.
Oblivitus5 years ago
Excellent work, 4.5 stars, if you can get it to work smoothly consistently, then I'll give it a 5.
I would say the misfires were due to human error, that he (prbably) didnt push the lever all the way forward, making it not load correctly.
Looks promising!
StyleCore5 years ago
Yes, innovation over power any day.
You know what you need? A video. Looks great. A video would really help though. Nice work!
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