The Glock 20SF is chambered in 10mm, the most powerful practical autopistol round available for personal-defense use. Though originally developed for the FBI, the Glock 20SF is these days probably most closely embraced by sportsmen, for whom the 10mm round serves as the favored brand of bear repellant. And the gun’s anti-wildlife capabilities are utilized not only by hunters: Soldiers in the Danish Special Forces, when patrolling Greenland, carry the big Glock as polar bear protection.

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