We ran an article on the new art and science of 3D printing of an AR-15 last year, which actually fired, but failed after only pushing six rounds. Re-enter the printer. big grin Initial design flaws have been corrected and now is capable of firing approximately 600 rounds without failing. So far this new technology is legal… for the time being, but with everything new on the Internet, it has yet to be tested in court.
Source: HardOCP