K'Nex Crossbow




About: Just your average K'Nexer/Programer/Nintendo DS fanatic. Any questions you would like to ask about any of the above? Send me a PM, I don't bite(much) ;-) If anyone wants to WIFI battle in pokemon, send me a...

K'Nex crossbow

its got power, and range. i don't have averages yet but the last version shot 20 feet and has some power. this version has good power and can pierce cardboard with a good shot from app. 5 feet away. not bad.

the reason i am posting this is to show a new idea i had for removable parts. the only removable part i have for it right now is the head rest, but i am hoping for people to make other removable parts for it.

this gun has a ratchet system on it. so it can take a lot of power from rubber bands.

the gun also has a ammo holder that goes into your pocket. you can see a picture of me holding the crossbow with the ammo holder in my pocket(yes it is me(yes i blocked out everything else)).

it is pretty easy to make, so i made it with the metal K'Nex pieces because i though it would be cool.

Step 1: Barrel

easy enough, just make from the pictures. its a track that the bolt travels on. nothing new.

Step 2: Ratchet System

the ratchet system. again, nothing to new here. making it from the pictures should be easy enough.

Step 3: Addons to Barrel and Bow

can't have a crossbow with out a bow. again nothing new. just make from the pictures.

Step 4: Renforce the Barrel and Handle

just more add ons to the barrel and the handle. make from the pictures.

Step 5: Stock

again easy. make from the pictures. it is 3 layers thick. look at the notes for some help if you don't get it.

Step 6: Head Rest Add On.

make from the pictures.

Step 7: Firing and Damage and Bolts

ok, well this is were i tell you how to fire it and make the projectiles and the damage it makes.

  • load a bolt
  • pull bow back and hook it into white connector
  • pull trigger
  • repeat

O i don't have pictures for the rubber band placement but put a small one on the trigger and two #64 rubber bands tided together for the bow.

Step 8: Extras

just the ammo holder.

well thats it for the instructable, i hope you like it.

please comment (all spam will be removed) and rate! :-)

Step 9: All My Other K'Nex Things.



    • Paper Contest

      Paper Contest
    • Tape Contest

      Tape Contest
    • Weaving Challenge

      Weaving Challenge

    325 Discussions


    4 years ago on Introduction

    Excellent weapon. Although it looks small, it is extremely powerful. However, I would have to rate it 9/10, due to the iffy trigger. But overall, good job!

    i put the stock a little bigger and i might just take off where the rubber bands go on and make the barrel longer & make it into a sniper rifle ( mabye)


    7 years ago on Introduction

    haha, looks great!! but is the front of the crossbow not a little bit weak??

    it should good to be modelcrossbow


    8 years ago on Step 3

    urrm isnt the bow a little bit weak? i mean if u put a couple of bands on it wud probly snap off??

    1 reply

    no it wont, i built this bow about a year ago and i have still got it, its one of my favourite weapons and ive managed to fit over 15 extra rubber bands onto it aswell as the main bow and god does it pack a punch, it can absolutely destroy about 3 coke cans in a row from about 10ft using a sharpened rod