Ar15.com user [HaveBlue] has been working for some time on a 3D printed lower receiver, and now reports that the parts are fully working. Using a Stratasys 3D printer from the 90’s [HaveBlue ...

The one drawback of a 3D printed AR-15 lower is that every other part of the ... break), the guys talk about the distribution of a CAD file of completely 3D printable weapon being a threshold ...