I work in plastic injection molding, and I've always wondered what plastic polymer framed guns are made out of. I've done some googling, but my guess is they're trade secrets. I have a few guesses but I haven't looked at a plastic gun close enough to try to figure it out. Might have to run to town and take a look at a few to see. (Only gun in the house currently is a Nickel plated revolver). Just curious being up early on a Saturday with not much to do...