Eight months ago, Cody Wilson set out to create the world’s first entirely 3D-printable handgun.

Early next week, Wilson, a 25-year University of Texas law student and founder of the non-profit group Defense Distributed, plans to release the 3D-printable CAD files for a gun he calls “the Liberator,” pictured in its initial form above. He’s agreed to let me document the process of the gun’s creation, so long as I don’t publish details of its mechanics or its testing until it’s been proven to work reliably and the file has been uploaded to Defense Distributed’s online collection of printable gun blueprints at Defcad.org.

All sixteen pieces of the Liberator prototype were printed in ABS plastic with a Dimension SST printer from 3D printing company Stratasys, with the exception of a single nail that’s used as a firing pin. The gun is designed to fire standard handgun rounds, using interchangeable barrels for different calibers of ammunition.