[Brad from Tennessee]

3-D printing is here to stay. 3-D printing in metal is a rapidly evolving industry. Whether or not 3-D printing of weapons parts is restricted by law the science will remain intact somewhere.

http://www.extremetech.com/extreme/143552-3d-printing-with-metal-the-final-frontier-of-additive-manufacturing

[tbw2]

What is a good way to invest in the 3-D printing developers?