Knex Heavy Pistol Cannon

This is my knex heavy pistol cannon it can go through a tin can. it shoots about 140 feet with 3 rubber band strings of 7 if you have the parts build it! happy building!

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Step 1: Trigger and Handle Support\breech

how to build the trigger,handle support and breech

Step 2: Handle

how to build the handle and put it on the handle mount

Step 3: Barrel

this is how to make the barrel

Step 4: Support

how to build the support

Step 5: Putting It Together

putting it together

Step 6: Rubberbands


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    46 Discussions


    10 years ago on Introduction

    So... How exactly does this work? I've got it all set up except for the elastics, but I just don't see how this could soot anything effectively. Could someone who has this working send me some pics of the bullet they used and how the elastics are setup and everything?

    1 reply

    Reply 9 years ago on Introduction

    Sorry about the late comment but, you pull back the rubberbands, hook them on the rachet and load from the hole in the front of the cannon and then shoot what you want to shoot.


    10 years ago on Introduction

    the barrel is impossible (I don't know the spelling of impossible) can somebody please send me a better picture.

    arrow shot

    10 years ago on Introduction

    Pistol: Small gun that fits in your hand and does not extend farther than 1 foot from your fingers. (estimate) Cannon:Big, extends far from your hand Opposites I would say

    3 replies
    greviousarrow shot

    Reply 10 years ago on Introduction

    hmm... also a "pistol cannon" seems a bit odd dont you say. and he says it does not have a stock, this does not make it a pistol. a pistol is generally a one handed firearm, a cannon is not, and take the barricade shotgun used by the police, no stock? definetally not a pistol.


    Reply 10 years ago on Introduction

    thats just and over-sized novelty weapon that probably doesnt fit into any class of weaponry, plus it looks as if that is from an old western movie, not real life.