The FN 509 Midsize MRD Handgun, now equipped with the FN Low Profile Optics Mounting System, offers direct compatibility with over 10 miniature red dot optics, enhancing your concealed carry experience. This pistol boasts a four-inch barrel, midsized frame, 15-round capacity, and compatibility with larger FN 509 magazines using a sleeve. Improved controls, enhanced grip texture on the included backstraps, and a flatter-faced trigger contribute to better handling, recoil management, and trigger responsiveness.