Just today one of my friends told me that Glocks used to be (back when they first came out) made out of high-impact ceramics and plastics. Now, I suppose it is theoretically possible to make a gun out of those materials entirely, but I really doubt they ever did. Also, the only other time I ever heard about a ceramic gun was in one of the Lethal Weapon movies, which I really don't consider a reliable source. Now, someone has to tell me if this is the truth or just some dirty little rumor.