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This instructable shows how to build a working K'Nex crossbow. Please be smart when using this, it can be dangerous. I suggest not using sharp projectiles and not aiming at anyone. I have a few dents in my wall from early testing.

 
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Step 1: Key

partslist.png
  • Build: build from scratch, unless otherwise noted.
  • Attach: adding pieces to an existing thing
  • Details: nothing new, just a different view

Here are all the parts and names used in this instructables.

Thor MCMXCVII says: Feb 25, 2013. 1:04 PM
I adjusted a few unnecessary parts and it works perfectly. I also build a nice target and I'm enjoying this. Thanks for the design! (y)
Storm950 says: May 2, 2010. 7:51 AM
Nice new trigger system. It looks like the black chain link pieces would be pulled out of the orange connectors if they were pulled so much though. Also I suggest making a new bow (the spring as you called it) such as one powered by counter elastic bands. Check IaC's cannon for reference. Good job.
~KGB~ says: Apr 29, 2010. 5:39 AM
not bad!
AlexWillisson (author) in reply to ~KGB~Apr 30, 2010. 6:18 PM
 Thanks!
~KGB~ in reply to AlexWillissonMay 2, 2010. 4:55 AM
no problem!
DJ Radio says: Apr 28, 2010. 8:25 PM
I can see you at least tried to put effort in it but TBH it's doesn't really have a good design.
AlexWillisson (author) in reply to DJ RadioApr 28, 2010. 9:33 PM
 I know, but this was something I made on a whim and decided to make instructions. I'm planning on improving the design when I have time.

Also, this is only my first K'Nex weapon. I don't have much experience in designing them.

DJ Radio in reply to AlexWillissonApr 29, 2010. 1:53 PM
You could have improved the design before you posted it?
AlexWillisson (author) in reply to DJ RadioApr 30, 2010. 6:18 PM
 Unfortunately no, I was on a deadline. I figured it was better to get good instructions for a early design, instead of spending forever improving the design. I'm planning on upgrading the design and revising the instructions when I have time. I already have a few ideas for that, also suggestions are welcome.
DJ Radio in reply to AlexWillissonApr 30, 2010. 7:14 PM
It's actually better the other way around.
AlexWillisson (author) in reply to DJ RadioApr 30, 2010. 8:07 PM
 It depends on how far you take it and how long you have.
Mr. Muggle in reply to AlexWillissonApr 29, 2010. 4:18 AM
very good first weapon!
AlexWillisson (author) in reply to Mr. MuggleApr 30, 2010. 6:18 PM
 Thanks!
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