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Picture of How to make a knex Balistic Knife
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this is a instructable which will take about 5 minutes to build a knex balistic knife. 

Step 1: Step 1: the chamber of the knife

Picture of Step 1: the chamber of the knife
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pic 1: build this

pic 2: add the red rod and red conector with white rod attached

pic 3: another view

pic 4: build this

pic 5: insert through middle hole

pic 6: add elastic band

 
i have a better knex ballistic knife
http://www.instructables.com/id/Knex-Ballistic-Knife-My-first-instructable/
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skyfaller4 years ago
You should try this:http://www.instructables.com/id/Blade-firing-K-nex-knife/
logitech5374 years ago
if you replaced the grey rod with a black one it would stop the firing rod bending as much when you have 3+ strong bands on it
boxing mag3 (author)  logitech5374 years ago
yes that would work
There are two 'l's in ballistic.
boxing mag3 (author)  RMConstruction4 years ago
im sorry my spelling isnt that good
~KGB~4 years ago
it needs to be improved...
boxing mag3 (author)  ~KGB~4 years ago
it only took me like 5 minutes to come up with but if you have any improvements please post
alri. i dont wanna make it
boxing mag3 (author)  ~KGB~4 years ago
why it works really good (fires an allright distance)
well its hardly goin about 20ft, its a bolk trigger.
boxing mag3 (author)  ~KGB~4 years ago
there is nothing wrong with block triggers andi can get about 20 ft but thats only because ihave 1 elesticbandif you puton more you could reach a high amount of power
yes there is.