I think the realization of it is likely to be much simpler: I expect widespread 3d printing (if it ever really becomes a common in-the-home thing, as opposed to stores printing stuff on demand) to be a curated, extremely simple experience, along the app store model.
Though I'm not sure that the economics/frequency of use would make it make sense to have one in every home, at all. Being able to get whatever replacement part or tool I might need fabricated on demand at Home Depot would be extremely cool to me; having to purchase all the equipment and consumables to do it in my own home appeals much less.
So I don't know that it would really derail a policy designed to greatly reduce the frequency of mass shooting events by making gun acquisition much more difficult. (Focusing strictly on the feasibility of that, and leaving aside for now any questions of whether private citizens need to have the right to have guns for other purposes.)
Though I'm not sure that the economics/frequency of use would make it make sense to have one in every home, at all. Being able to get whatever replacement part or tool I might need fabricated on demand at Home Depot would be extremely cool to me; having to purchase all the equipment and consumables to do it in my own home appeals much less.
So I don't know that it would really derail a policy designed to greatly reduce the frequency of mass shooting events by making gun acquisition much more difficult. (Focusing strictly on the feasibility of that, and leaving aside for now any questions of whether private citizens need to have the right to have guns for other purposes.)