A factory FN magazine for the FN 503, the company's slim single-stack 9mm built specifically for concealed carry. Because the 503 was designed around a genuinely flat profile, magazine fit and feed geometry matter more than on a chunkier double-stack, which is exactly why a factory-spec spare is worth having rather than an aftermarket guess. This is a flush-fit black magazine that keeps the pistol's low-profile grip signature intact. Keeping a second or third magazine on hand means less time reloading during range sessions and a reliable backup in your carry rotation.

In stock and ready to ship straight to your door from Dawson Defense, an Arizona-owned licensed dealer.