Introduction: M4 Carbine
I built nightfox939's M4 and it turned out pretty good. I think I know why he didn't post the instructions, because it would be a big pain in the a**.....But if you study the pictures like i did you should able to build this gun. Also if it may help i used the trigger system off of the instructable called knex gun with new trigger & sear.
We have a be nice policy.
Please be positive and constructive.