[ctdonath2]

You mean "not detectable" like this one?

That's pretty detectable - and is precisely the type that caused the "not detectable" hysteria.

[mbraynard]

Have you never flown before?

If you were able to pass through the metal detector with it, it would never get X-rayed.

And I never asserted that such a gun existed but it seems entirely possible to make one and it may be that some US agencies have such weapons for good reason.

And no major manufacturer is going to try to make one - because they can't sell it (as, *cough* it is banned.)