Ok so I haven't gotten around to updating this idea yet, I have come up with a new approach though that should help keep the cost down. The idea is that the main mag shell is 3d printed, like high caps this magazine will include a spring loaded wheel (elastic band really), around the wheel will be a flexible thin wire. When the wheel is wound, and the magazine filled with bb's, this wire will be used to push the bb's into the airsoft gun. I believe this to be a better approach as its easier to design and get the parts for, for anyone intending to make it. The next piece I need to figure out is the small pin the prevents the bb's flying out when the magazine is unloaded, the current Idea is to just use a spring from a pen to keep the pin under pressure.

I still hope to get around to designing the cad files for this once I'm on my break from college.