Knex Crossbow

by the_boss_builder

28K10889

Intro: Knex Crossbow

this is my first ever instructable so please excuse any hard to follow directions. this is my "piece conservative" crossbow. it has a range of about 30ft shot flat and 40-50ft angled. it also feqatures a new type of trigger that works really well.
p.s. please rate and sub!

also check out my combat/tactical knife at; https://www.instructables.com/id/knex-combattactical-knife/

STEP 1: Bow

make/gather two of every thing although when assembling make in reverse
pic 6 make four 
pic 10 flip to under side

STEP 2: Rail

pic 1 make three
pic 2 make two
pic 3 gather nine
pic 4 assemble like this
pic 5 add the two other rails
pic 6 add these snowflake connectors
pic 7 dont forget the blue clip
pic 8 attach to bow like this
pic 9 another veiw

STEP 3: Handle+trigger

STEP 4: Fore Grip

i know it  is too simple please elaborate and show me your own versions
pic 1 make two

STEP 5: Main Bands

do exactly as the pictures show and you should have no problems

i used two 8in bands that r broken but u can put two 6 or 8in bands together and just anchor them in the same places as shown
pic 4 it is crucial that when loading, that the band(s) r placed higher than the notch in the connector

STEP 6: Your Finished

now go out and have fun

STEP 7: Who Else Made It?

First picture is of the creation by Blackhawk7992. The second picture is by mrknex3000 as well as the third being his new grip. If you build it please post a picture of it and I will put it in the instructable ASAP with credit to you of course, HAPPY BUILDING!

79 Comments

snarco07 2 years ago

Hi, here is the best arrow design for this. It's not knex, but it's super easy and flies 10x farther than I could get the shown one to go. You take a skewer put two pieces of duct tape on the end, one front one back, and then trim the duct tape. the arrow goes in with on fin sticking up, which is what the rubber band catches on.

johnsssrwre 2 years ago

A much better bullet is three horizontal orange connectors stacked vertically, connected to three white horizontal sticks, connected to another three orange connectors. You tie them together on each end with a vertical white stick. This has four advantages: (1) the bullet doesn't fall apart upon hitting something, (2) it runs smoothly down the track, not tightly like the bullet featured in this instructable, (3) the elastic band always catch the tops of the two vertical whites, and (4) the acceleration is down the full length of the track, not only half of it.

Creater0479 3 years ago

Going to make this. Looks awsome and range is good for a crossbow.

SparkBark 3 years ago

I like it, although maybe in the future, you could have your camara focus on the thing you want to present, like in how step 5, the rubber bands where out of focus

Petecerea 8 years ago

Nice bow I have a battle fleet I posted and a mp40 and ak74 if you want to see it please tell me on my fleet

Harvey knex 9 years ago

You should enter this into the contest

knex builder. 9 years ago

Nice might build check out my new guns. I love my new guns

victorstory 9 years ago

These instructions were confusing and hard to follow, please make a better one, because I can't make it with these

Atom 6 10 years ago

Make a video!!! I really want to see it working cause I think I don't have enough parts.

the_boss_builder 10 years ago

I will first apologize for being untimely in my response, and then I will tell you that I may rebuild the crossbow and put up a video. I will first need to do some pretty serious posting of other instructables of various sorts.

War pig 10 years ago

This is sick looking........I would build it but I don't have very many yellow peices

Silent_Shadow 10 years ago

Great Bow but I couldn't make the firing slot cuz lack of pieces, I added it onto a design I had made earlier and improved it quite a bit, thanks

LvNo1000 11 years ago

WHOA. Now, thats an impressive first instructable! true trigger and everything! :O *impressed*

the_boss_builder 11 years ago

thank you very much, I appreciate your positiveness. The trigger was my own idea and I hope to build more innovative things, I would like to see more of your stuff as well!

knex dude 2000 11 years ago

Alright robin hood. lol this is epic. totally great instructions.
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