ccwinstructor
Centurion
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
http://gunwatch.blogspot.com/2013/01/printed-ar-15-magazine-data-now-free.html
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
http://gunwatch.blogspot.com/2013/01/printed-ar-15-magazine-data-now-free.html