this is my knex gun
it shoots more than 120ft !!
I think this is the most powerfull knex gun ever made, If someone knows a more powerfull knex gun plz send me a picture or instructable.
it shoots with 20 rubber bands and is very easy to make !!
if you want you can make the barrel even longer and use more rubber bands, it will shoot even further !! So stop reading this and get to work !