Undetectable Metal Being Developed?

Well on some recent research i did i was searching for government weapon development and i ran across few guns being developed and over metallic things being created in factorys in scattered states most in the U.S. durable Items are made with undetectable metal that could be carryed by spec ops and/or government intelligence that could be useful in metal detectors, searches and any other relations of that matter.

i hope noone says anything stupid.like i said im suspicious.

[Edited on 29-6-2003 by inuyasha]