Yes, 3D printing can be used to create weapons that are less detectable by traditional security inspection and scanning technology. This is because 3D printing can be used to create complex geometries and use a variety of materials, including plastics, metals, and ceramics, which may not be detected by traditional metal detectors or X-ray machines. In 2013, Cody Wilson of the American Defense Weapons Company designed and printed an all-plastic pistol known as the "Liberator Assault Rifle." The pistol was made entirely of 3D printed plastic and had no metal parts except for a small metal retaining ring in the firing mechanism. Wilson's design was intended to demonstrate the feasibility of 3D printed firearms and the potential for such weapons to bypass traditional security detection. Since then, others have designed and produced other 3D printed guns, including more complex and deadly designs. As 3D printing technology advances and becomes more available, the potential for creating weapons that are less detectable has also increased. However, it is important to note that: 1. The reliability and accuracy of 3D printed guns vary, and some designs may not be as reliable as traditionally manufactured guns. 2. Many countries have implemented laws and regulations to restrict the production and possession of 3D printed guns and other unregulated or unregistered firearms. 3. Although 3D-printed guns may not be detected by traditional metal detectors, they may still be detected by advanced scanning technologies, such as computed tomography (CT) scanning or millimeter wave scanning. 4. The use of 3D-printed guns may pose significant safety risks, including the risk of gun malfunction and accidental discharge. In response to the potential safety threats posed by 3D-printed weapons, governments and regulators are exploring new safety measures, such as: 1. Advanced detection technologies, such as artificial intelligence-driven scanning systems and nanotechnology sensors. 2. Enhanced regulation, such as requiring serialization or tracking of 3D-printed guns. 3. Public awareness campaigns to educate people about the risks and legal consequences of 3D-printed guns. 4. Research and development of new materials and manufacturing technologies with built-in safety features that make them less likely to be used to manufacture unlicensed weapons. Overall, 3D printing technology can be used to create weapons that are less detectable by traditional safety inspections and scanning technologies, but this risk can be mitigated and public safety can be ensured through advanced detection methods, enhanced regulation, and public education.