There was a panic about plastic guns back in the 80s too when the Glock came out, and Congress passed the Undetectable Firearms Act.

But it was just as misinformed as it is today -- practically speaking, only metal is suitable for the high pressure components of a gun. A common 9mm cartridge produces upwards of 35,000 psi.

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saltyoldman 2 days ago | parent [-]

Aren't there metals that are undetectable/less detectable, like titanium or even stainless steel?

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jandrewrogers 2 days ago | parent [-]

No, it doesn’t work like that in the modern world. The nature of the materials are pretty obvious to a remotely competent sensor.

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RugnirViking 2 days ago | parent [-]

using what physical process? How exactly do they detect any metal? A genuine question.

	▲	kube-system 2 days ago \| parent [-]
		You can detect nonferrous metals by inducing eddy currents in them, then they become magnetic.