This article shall be short and sweet.
These are 3D plans for guns everyone interested in preserving their rights should have. You want the "_complete.zip" files which contain the SolidWorks files you need to print the parts.
Directory Listing:
http://www.codeisfreespeech.com/code_files/
AR15: 
AR10: 
1911: 
*(SLDPRT files are typically opened using SolidWorks. However, they may also be viewed with SolidWorks eDrawings Viewer, Autodesk Fusion 360, and Adobe Acrobat 3D or Acrobat Pro 9 or later.)
Because let's be honest here... If we're begging government permission to do something which is unalienable from us, well -- we're doing it wrong.
Happy printing!!