Fn 509 Tactical 9mm Luger 4.5 inch 17+1/24+1 Flat Dark Earth

The FN 509 Tactical builds on the FN 509 series and the company's Modular Handgun Trials submission to deliver a duty-ready 9mm Luger that suits tactical, duty, and range applications, featuring FN's U.S. Patent No. 10/352654 Low-Profile Optics Mounting System to accept more than ten miniature red dot optics that co-witness with suppressor-height night sights for fast target acquisition and low-light shooting. The flat dark earth polymer frame with interchangeable FDE backstraps and Picatinny rail provides positive ergonomics for controlled follow-up shots while the serrated, optic-cut stainless slide and textured slide cap protect iron sight alignment and offer reliable racking against clothing or gear; its FN-signature 4.50" cold hammer-forged stainless barrel with target crown and 1/2"-28 threads, thread cap with integrated O-ring, and 7.90" barrel type footprint accept the majority of 9mm suppressors for reduced report during suppressed training or operations. With a DAO trigger feel, 3-dot night/suppressor-height sight configuration, and capacity options of 17+1 or 24+1, this semi-auto pistol balances service-level durability, controllability, and high-capacity capability—FFL required for transfer.