The 509 Compact NMS (Night Sight Model) ships with factory Trijicon HD night sights as standard equipment, the only 509 variant to include factory tritium sights. Type: Pistol Action: Semi-Automatic Caliber: 9mm Capacity: 12 Year introduced: 2020, Belgium Weight: 25.5 oz Overall length: 6.8" Status: Active Intended use: Concealed Carry, Duty