The FN 503 is a slim single-stack 9mm with 8+1 capacity. FN's entry into the slim CCW market features an optics-ready slide option and FN's quality manufacturing. Type: Semi-Auto Pistol Action: Striker-Fired Caliber: 9mm Capacity: 8 Year introduced: 2019, USA/Belgium Weight: 21.2 oz Overall length: 6.1" Status: Active Intended use: Concealed Carry