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FN 503 Slim 9mm Review

The new FN 503, a slim 9mm concealed carry pistol, combines shooter-friendly features with battle-proven reliability to create the most rugged, reliable EDC handgun on the market.

FN 503 Slim 9mm Review
Photo by Brad Fitzpatrick

A couple years ago, FN launched their modular, striker-fired FN 509 9mm pistol, a gun that was met with instant praise and which has developed a large and growing fanbase. One of the primary reasons FN owners remain so loyal to their chosen brand is reliability: FN guns are, after all, the world’s most battle-proven firearms, and the company fired more than a million rounds during development of the 509. From back alleys to the battlefield, shooters know they can rely on their FN when their life is on the line.

Though the FN 509 remains a popular choice among shooters and law enforcement professionals, its...

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