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