Completing an 80% lower used to be kind of difficult (for the average cubicle dweller) and required some tools and know how. Now a days you can get it done with an inexpensive machine or a highly specialized 3D printer. I talked about this back in October, and Defense Distributed is finally shipping these 3D printing machines. Check out this overly artistic trailer:
Cool concept, but make sure to check your laws before you go building. I'd like to see some reviews from folks that have printed with and how long these printed lowers (from this machine) last before they crack. Head over to ghostgunner to learn more. What do you guys think?