Believe it or not, a user from the HaveBlue AR15 gun forum used an old 3D printer to fabricate a working gun. That’s right, he has used the gun to fire over 200 rounds successfully. According to its creator, “people will be able download CAD files of firearms and then 3D print them.” Continue reading for more pictures and information.

Then he went to the next level, and 3D printed the “upper” part. With the upper and lower now in hand, along with other manufactured parts, he assembled a .223 rifle. And while he had some issues with feed and extraction, it proved successful. He suggests that only gunsmith experts try this at home, as one little mistake could cause the firearm to explode in your hands when you pull the trigger.

[Sources 1 | 2 | 3]