PRODUCT DESCRIPTION PRODUCT SPECIFICATIONS FN 509M T 9MM FDE 10+1 HOLOSUN Manufacturer: FN Barrel Length: 4.5" Color: Polymer Frame Flat Dark Earth Polymer Polymer Frame UPC: 845737018436 Caliber: 9mm Thread Pattern: 1/2x28 Finish: Flat Dark Earth Model: FN 509 Midsize Tactical Action: Striker Fired Capacity: 10 + 1