Print Your Own AR-15?

3-D printing or additive manufacturing will be a transformative technology of the future along with many other advances in technology. There is a current gun debate going on in the country, and this technology possibly holds the key to preventing the government from being able to ban guns because in the not-too-distant future you will possibly be able to print a gun using a 3-D printer. This guy says that he has already printed a functional AR-15. I doubt that he actually created a functional firearm using this technology because it is not currently possible to create a barrel using this technology that would be safe to shoot. From an investment point of view, 
3-D printing is worth investing in, DDD.

Overall, advances in technology-- computer generated news articles, automation, artificial intelligence, robots, and self-driving cars (truck drivers will become obsolete)-- will greatly transform our lives in the not-to-distant future. All of the good jobs of the future will be in engineering or jobs that require creativity and brain power: you will have to be smart. If you want to set your kids up to have a sucessful economic future, then make sure they learn math. If you can do math, then you can go to a school like Georgia Tech and be as close as you can get to having a guaranteed bright economic future.