Defense Distributed has created a website that is the "island of misfit (firearms) objects" that others have censored from the web. Chief among these are the data to print a complete, functional AR15 magazine, including the spring.

The current data is limited to a five round design, but it appears that it could easily be altered to a 10, 20, or 30 round design, especially if the maker is willing to add cheap and reliable steel springs.

The necessary springs can be hand made from wire, if desired.

Defcad AR-15 Magazine Link

Link works at the site.

Dean Weingarten