The FN 509 Midsize MRD 9mm 4in 15/24rd, also known by its model number FN 66101930, is a remarkable addition to the FN firearms lineup, designed to enhance your everyday carry experience. This innovative 9mm pistol is engineered with the FN Low Profile Optics Mounting System, allowing for seamless integration of over ten different miniature red dot optics, making it an ideal choice for those seeking precision and adaptability in a concealed carry firearm. The FN 509 Midsize MRD boasts a four-inch barrel and slide, providing a balanced and manageable profile that is perfect for both concealed carry and range use. With a standard 15-round capacity, this pistol ensures you have ample firepower at your disposal, while also offering compatibility with larger 24-round FN 509 magazines through the use of a sleeve, catering to those who prefer extended capacity. The ambidextrous controls are thoughtfully designed to accommodate both left and right-handed shooters, enhancing ease of use and accessibility. Additionally, the improved texturing on the two included backstraps offers superior recoil management, ensuring a comfortable and secure grip during operation. The new flat-faced trigger is a standout feature, providing a more controllable trigger press and a cleaner break, which is essential for accuracy and confidence in high-pressure situations. The FN 509 MRD is not just a firearm; it is a comprehensive solution for those who demand reliability, versatility, and performance in their everyday carry pistol. Whether you are a seasoned shooter or new to the world of firearms, the FN 509 Midsize MRD is engineered to meet your needs with precision and excellence, making it a top choice for anyone seeking a dependable and adaptable 9mm pistol. With its cutting-edge features and robust design, the FN 509 Midsize MRD stands as a testament to FN's commitment to quality and innovation in the world of firearms.