The FN 509 Tactical is a professional-grade striker-fired pistol chambered in 9mm Luger with a 4.5" threaded barrel and optic-ready slide designed for tactical and duty applications.FN 509 Tactical 9mm Luger Pistol4.50" threaded steel barrel with target crown15+1 round capacity with included 24-round magazineOptic-ready serrated slide with suppressor height 3-dot night sightsMatte black polymer frame with integrated Picatinny railStriker-fire action with ambidextrous controlsBlack interchangeable backstrap grip systemEngineered for law enforcement military and civilian tactical use this pistol offers superior accuracy and versatility with suppressor compatibility and multiple optic mounting options.