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

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<br>http://www.instructables.com/id/Knex-Ballistic-Knife-My-first-instructable/
You should try this:http://www.instructables.com/id/Blade-firing-K-nex-knife/
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
yes that would work
There are two 'l's in ballistic.
im sorry my spelling isnt that good
it needs to be improved...
it only took me like 5 minutes to come up with but if you have any improvements please post <br>
alri. i dont wanna make it
why it works really good (fires an allright distance)
well its hardly goin about 20ft, its a bolk trigger.
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.

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