Both.
the glock frame is made of hitech polymer. but only the frame
I do not trust the standard Glock front sight. It is made of plastic and pins to the slide underneath. To me, replacing the standard plastic Glock sights is a NECESSITY and you can buy the Glock with steel or tritium sights or have them installed aftermarket. It's the weakest point in the Glock design.
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They where made out of Metal and plastic the Plastic is called zlonite.
The lenses are made from either glass or plastic. The frames are generally made from plastic, nylon, a metal or metal alloy.
plastic and metal :|
mainly metal and plastic (plastic cover metal inside)
it is made out of plastic and the rod to the brain is metal/plastic
They are made of both metal and plastic
Plastic
Glock is the company which makes them.
Hair grips can be made with either plastic or metal. Some of them have plastic coating over the top of the metal.