Introduction: K'NEX Crossbow

Picture of K'NEX Crossbow

This is a simple crossbow using some K'NEX and 1 rubberband. It's fast, easy, and it shoots a K'NEX projectile really fast

Step 1: PARTS

Picture of PARTS

For this project you're gunna need:

2-red connectors
3-green connectors
6-yellow connectors
4-yellow rods
1-small green rod
8-small white rods
1-red rod
2-grey clips


Picture of FRAMEWORK 1

Use the picture provide to help you build the first part of the frame.


Picture of FRAMEWORK 2

Once again make these 2 peices using the picture.

Step 4: Finishing the Frame

Picture of Finishing the Frame

Attach the 2 pevious peices and the red rod.

Step 5: Firing Mechanism

Picture of Firing Mechanism

Attach the rubberband to the 2 grey peices like so.

Step 6: Finishing Up

Picture of Finishing Up

Attach the firing mechanism to the top of the frame so it looks like the first picture.

Step 7: Firing

Picture of Firing

Now you're ready to fire. For ammo you can use any K'NEX peice with a hole than you can slip over the rod and that has some plastic on top to catch the rubberband. In the picture im using a red connector because they seem to work well but it really dosen't matter. Thanks for viewing my instructable, this is my first one so any comments on what to do differntly next time would be helpful.

Step 8: MOD

Picture of MOD

I have recently discovered that when the first rubberband i use snapped because it was too worn out, i replaced it with the same kind of rubberband but this 1 was more powerful so, when i went to fire the frame came apart. I have made a mod that stops this from happening by adding 2 more rubberbands and 2 white peices. I have also discovered that the grey clips are the best ammo to use. After i made my mod and tested it with the grey clip this thing was shooting so fast it bounced off the wall from about 20 feet back, came back and hit me. I also went outside and shot it and it measured at about 42 feet with wind. This weapon is devastating at point blank (0-6 ft.) Try shooting 1 of your friends...or enemies. Also on the picture in the firing step i have it flipped the wrong way so flip it over when firing also when using the red peices they should be facing downwards with the hole at the top. I hope this clears some things up


JonnyBoyyizBack777 (author)2014-02-28

some crossbow you got there

petey2000 (author)2013-07-10

ugliest crossbow ever mine our awesome

nbagf (author)2010-05-23

 if so many people like it then why does it only have 2.6 stars?

Yerboogieman (author)2008-03-08

now to make it hand held

Wafflicious (author)Yerboogieman2009-01-17

wont be that hard.

ppieters (author)2008-06-19

way cool!! when I stand a little from a wall and the fire at it, it bounces right back! now thats powerful!

kibbler (author)2007-11-22

ur right its completely awsome

Easy Button (author)2007-02-02

wow this thing is powerful with only like 20 pieces


i made one stronger and it only takes SIX pieces!!!!!!!!!!!!

345138 (author)2007-08-02

heres a mod.. pull both back it makes it srtonger

gunboy (author)2007-07-01

nice gun and you can make it with 20 or so piececs.

paulm (author)2007-06-13

not a crossbow. unless it draws power from the bow material (the plastic peices) its using the rubber band to fire. my crossbow uses the bow.

KamikazeSniper360 (author)2007-04-29

Wow. This is a great gun for me cause I don't have many pieces. It shoots a good 15-20 feet for me.

gazz007 (author)2007-03-05

how the hell u use this

Easy Button (author)2007-02-03

wow i got it beter now i made some mods and it gos like 62 feet and its stablelized beter.....

siege engines ahoy (author)2007-01-21

this is a really well made design, really simple.

JamesY (author)2006-12-20

thanks and yea the fist picture was on my counter lol the others were actually on the floor which looks really similar.

crestind (author)2006-12-19

Knowing that you have a limited number of pieces, this is a good, basic crossbow. I spy Corian countertops.

JamesY (author)2006-12-19

There are many other ways to make this but i had a very limited amount of pieces since ive only had 1 K'NEX set im my whole which i got when i was 5...10 years ago

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