Whether you want a FN 503 extended magazine for self-defense and fun at the range or if you want a standard replacement mag for excellent concealability, GunMag Warehouse has got you covered. With both Black and FDE finish options to match your firearm, you can be sure your 503 mag will be a perfect fit. These high-quality and dependable factory FN 503 magazines are constructed out of durable stainless steel for long-lasting performance and reliable function.
