The development of 3D printing is rather tortuous. It has been around since the 1980s and has only recently begun to be accepted by ordinary investors. When it first appeared in industry, the cost was so high that only the company could afford it. The 3D printer first appeared at the consumer level in 2009.
In 2013, the concept of 3D plastic functional guns was introduced to the world. The problem with plastic function guns is that people can access their blueprints and print them at home without having to perform security checks.