Dangerous and potentially deadly homemade 3D-printed guns are being discovered in Australia in record numbers.

A month ago, Queensland Police found three plastic handguns at a Sunshine Coast home along with a 3D printer.

In 2016, an elaborate weapons factory was uncovered on the Gold Coast. Among other things, it was producing homemade machine guns.

The 3D guns seized on the Sunshine Coast were fully functional, despite looking like toys. (Queen)

Basic 3D printers retail for just a few hundred dollars and blueprints for plastic guns are freely available online, meaning weapons can be cheaply manufactured at the click of a button.

Because they're made of plastic, 3D guns are difficult to detect through airport metal detectors and can also be easily destroyed.

There are fears organised criminal gangs are now turning to the undetectable plastic weapons to circumvent Australia’s tight gun control laws.

The 3D printer used to produce the guns found on the Sunshine Coast. (Queensland Police Service)

READ MORE: Everything you need to know about 3D printed guns in Australia

While it is illegal across the country to manufacture a gun without an appropriate license, New South Wales is the only state in Australia to specifically outlaw 3D guns. There are calls for similar laws to be made in other states and territories.

Sam Lee is the head of Gun Control Australia. (9NEWS)