What groundbreaking product design feature did Glock introduce in 1982 that initially caused controversy but later became standard in modern military and police sidearms?

In the evolution of military and law enforcement firearms, few designs have made as significant an impact as the Glock pistol. Its polymer frame revolutionized sidearm design when it was introduced in the 1980s. Beyond its lightweight construction, the Glock became famous for its reliability, simplicity, and distinctive product design philosophy. Test your knowledge about this iconic firearm that changed how military and law enforcement organizations equipped their personnel worldwide.

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Polymer frame (plastic receiver) that reduced weight by 30% while maintaining durability
Bullpup design that placed the magazine behind the trigger group
Integrated silencer system built into the barrel
Caseless ammunition system that eliminated the need for shell ejection