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Knex Heavy Crossbow

Knex Heavy Crossbow
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Well folks, this is a little project I've been working on very half-heartedly for ages. It was originally going to be a concept gun, and it was half done I tried to build it for performance as well. So, I got this slightly odd cannon-ish crossbow.

Anyway, the two main new things I put into this gun are the bending limbs, which I have found have actually increased power by a large amount, as well as making it look cool. The other thing was the repeating mechanism I've had bouncing around my head for a bit.

So, all in all, it's a huge, repeating, missile-launching crossbow. It gets 100 feet of range from its sitting position with the elastics shown. More could easily be added, but I didn't. Don't ask me why, I don't know.

Enjoy!

Video to come.
 
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Step 1A few things...

A few things...
I got a few things to say before you get started.

1: This is a difficult build. Its complicated, tricky, and overall requires a fair bit of skill. I would not recommend building this as a first project, or anywhere near that mark for that matter.

2: This gun is mostly a concept idea. If you are building this just for the sake of building something that can chuck lumps of knex great distances, this is good, but there are certainly other guns out there that will do the same, whilst being more piece efficient, smaller, easier to build... I'd try some of cannons if that be what you are looking for.

3: Just a little something that I always do... Building is much more enjoyable and relaxing if you are prepared. Sounds dumb I know, but I always build to my favorite music, in my favorite chair with a dish of cookies and some tea, and I always, always have all the pieces I need with me. Part counts are my best friends. It makes it so much more pleasant than crouching on the floor trying to find the pieces to put together this and that.

4: For all you people who will be asking: "Oh boy oh boy, there must surly be 4 more versions coming out soon!", tough beans. There will be no other versions, though I may try my luck with making a rod shooter with this mechanism. That won't end up looking much like this though, if I ever do build it.

Anyway, if you made it through that and still wish to build, best of luck to you!

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423 comments
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Feb 10, 2012. 6:29 PMknexbuild says:
I made this and it's awesome! 5 stars.
Feb 10, 2012. 9:15 PMknexbuild says:
It was hard to build it, but it was worth it. I am going to test it out tommorow.
Nov 11, 2011. 1:24 PMNrogers192 says:
That's awesome
Oct 29, 2011. 7:37 AMbjarne96 says:
what does it shoot
Oct 13, 2011. 9:40 PM~Vortex~ says:
Wish that I have that much pieces. *Sigh*
Oct 17, 2011. 1:03 AM~Vortex~ says:
Can you make a mini one? I want to shoot my brother with it.
Sep 27, 2011. 5:15 PMInventor X says:
Ima go Rambo with this thing
Sep 13, 2011. 4:09 PMbrainiac120 says:
I saw 35 light gray and I was gone.
Apr 2, 2011. 9:44 AMFr-Pa-Co says:
when is the vid going to come?
May 2, 2011. 4:22 AMFr-Pa-Co says:
ok
Aug 19, 2011. 2:30 AMFr-Pa-Co says:
Are you ever going to do a vid
Jul 12, 2011. 12:43 PMjames4 says:
HOW MANY FRIGGING KNEX DO YOU HAVE??????
Jul 17, 2011. 11:54 AMjames4 says:
:O oh my thats is ALOOOOTTT of pieces i only have 0 and a half
Apr 7, 2011. 4:12 PMThomasRex says:
I have built all of your cannons and your heavy cannon three times the sr-v1 four times the sr-v2 three times and about 20 other guns do you think i will have much trouble building this?
Jul 9, 2011. 7:42 AMDJ Radio says:
And yet you couldn't think enough to not make this comment necessary to post?
Apr 9, 2011. 1:11 AMmahmel says:
Nothing is impossible, just look good and have patience
May 15, 2011. 5:08 AMrangemaster says:
Im going to take this idea and cross it with me super sized V1 cannon and see what happenes
May 1, 2011. 11:13 AMi am super awesome says:
ive built every single one of your cannons and just finished this!! 5 stars for sure its amazing!!
Apr 1, 2011. 10:37 AMFr-Pa-Co says:
i am in the process of making a 2034 piece gun . That sounds awesome
i shall tell you when im finshed
Mar 13, 2011. 7:41 AMBenjamin Grover says:
I built it, including the bi-pod. it is bloody amazing, awesome gun 5 stars!!
Mar 15, 2011. 12:05 AMFred the evil puppet says:
Are ALL of the blue rods needed?
Dec 1, 2010. 10:28 AMshieldsam says:
in pic 4 of the introduction, whats that block in the barrel that looks like a huge piece of ammo?
Mar 14, 2011. 2:16 PMFred the evil puppet says:
So, is this the same mechanism as your heavy cannons?
Or something else?
Dec 24, 2010. 1:51 AMshieldsam says:
wouldnt it block the ammo from going into the barrel? i would build it and try but i haven't got a quarter of the pieces. along with all my pieces, i worked out that for the pieces i need, it would cost me about £70 ($108). no chance of me building this beast then!
Dec 24, 2010. 7:33 AMknexsuperbuilderfreak says:
when the bands are pulled back it is pushed back then you hook it on the trigger thing and the ammo comes up
Mar 15, 2011. 11:42 AMlaserbeam says:
how do you do pic 19. and yes knexpert dolph.
the blue rods are neaded
1-40 of 423next »

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