The 509 features 3-dot style luminescent sights along with a polymer frame for reduced weight and improved corrosion resistance. The pistol also features ambidextrous controls and interchangeable backstraps to accommodate a wide variety of users. The Compact Tactical variant is designed with personal protection and customization in mind, featuring a shorter grip and barrel length for easier concealment and a removable rear sight and threaded barrel for mounting optics and compensators. This model is chambered in 9x19mm Luger and features an all-black color pattern. Two 10-round magazines are included.