semiauto/burst 3/full auto

has any one got any ideas for a semiauto/burst 3/full auto knex gun?

somthing like this 
http://science.howstuffworks.com/machine-gun3.htm
or this 
http://www.hunter-ed.com/wa/course/2-7_actions_lever.htm
or this
http://science.howstuffworks.com/shotgun2.htm

madnukeist (author) 6 years ago
i have an idea but i need 2 or 3 lego tecnic 1x4 gear rack
TheDunkis7 years ago
I've sort of had an idea for one but I still have yet to figure out how to build the actual mechanism.
i had one but it involed to many pieces to be practical