Last year, university employee Yoshitomo Imura became the first person sentenced to prison for 3D-printing a firearm. A Japanese judge put him away for two years after noting with particular fury that he'd posted his design online and that "This has shown that anyone can illegally manufacture guns with a 3D printer."
So how did the gun law-flouting 3D printing community respond?
You knew the answer, didn't you? Yes, tinkerers went and improved his zig-zag design, and named the sleeker .22 gun after him.
Below, the original Imura design aces its test-firing.