In fact, 83.7% (by weight) of the Glock pistol is normal ordnance steel and the "plastic" parts are a dense polymer known as "Polymer 2", which is radio-opaque and is therefore visible to X-ray security equipment. In addition, virtually all of these "plastic" parts contain embedded steel not to make the firearms "detectable", but to increase functionality and shooting accuracy. Contrary to popular movies like Die Hard 2: Die Harder, neither Glock nor any other gun maker has ever produced a "porcelain", "ceramic" or "plastic" firearm which is undetectable by ordinary security screening devices. Even if a pistol completely undetectable by either X-ray machines or metal detectors were to be developed, the ammunition inside would still be detectable.
