3D-printed gun sparks debate
3D printing is being hailed as the future of how things will be made.
It works by printing out layer upon layer of plastic to turn your a design into 3D reality.
Now the world's first working gun has been made using 3D printing.
It's sparked a debate about gun control around the world.
Anti-gun campaigners are worried that, as 3D printing becomes cheaper and more accessible, it'll make it easier for firearms to get into the wrong hands.
Watch Ricky's report for more.