The FN 503 is a polymer frame striker-fired subcompact semi-automatic pistol manufactured in Columbia, South Carolina, by FN America, a division of FN Herstal.
Introduced in March 2020, it is chambered in 9×19mm Parabellum and is intended for concealed carry.
[3] The FN 503 is a striker-fired handgun with a stainless steel slide.
The three-dot iron sights are low-profile, while trigger pull averages 5 pounds-force (22 N).
[4] Magazines are either 6-round with a pinky extension or 8-round with a grip sleeve.