3D Printing. Why a magazine ban is now a joke.

Soldier Systems has an article up that asks very important questions about 3d printing an how it will affect firearms.

Read it at his house but I have a much more basic question.

How do you limit magazine size when this is possible?  A Glock Mag is tailor made for this process and I can take the sizing on a 33 round mag and plus size it up to a 50 rounder without problem and circumvent any attempts by authorities to limit my capacity.  That's taking it to extremes but you get the idea.

Technology is making us slaves and technology is setting us free...how do you limit the spread of knowledge especially in a community as tight knit as the shooting community is?  The gun grabbers have already lost.  They just don't know it.