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Despite initial resistance from the market to accept a perceived "plastic gun" due to both unfounded durability and reliability concerns, as well as fears that its use of a polymer frame might circumvent metal detectors in airports, Glock pistols have become the company's most profitable line of products as well as supplying national armed forces, security agencies, and police forces in at least 48 countries. Glocks are also popular firearms among civilians for recreational and competition shooting, home and self-defense, and concealed carry or open carry.

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