Originally Posted By Armed Scientist: Hey, Polymers are stronger then metals. I think you'll be seeing more and more 'plastic' guns, and I think this is a good thing. The age of metals is drawing to a close, in the coming years more and more things will be ceramics, polymers, and other more far off things like graphite nanotubes, or dimond latices.
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I don't mind plastic. What I object to is that HK charges an arm and a leg for a firearm that cost them a couple of bucks to make. The reason the firearms industry went to plastic is not because it is stronger than metal, it's because it can be formed very cheaply into whatever shape you need. The materials are cheap, and there are no machining costs associated with plastic.
And.... You are flat wrong. Plastic is not stronger than either steel or aluminum. The strength to weight ratio of plastic isn't even that close to metal. Tensile strength of aluminum and steel are far greater than any thermoplastic. Polymers are strong
enough to be used for high stress applications. They also have good flex qualities.
If the age of metal is really drawing to a close, why are all the leaps in lightweight, high strength material technology being made in the
metal alloy industry?
Do what you will,
just don't think plastic will ever replace steel or aluminum."