FN 509 MID MRD 9MM FDE 4" 10+1 OPTICS MOUNTING SYSTEM Manufacturer Model Number: 66-100742 Manufacturer: FN Model: FN 509 Midsize MRD Caliber: 9mm Type: Semi-Auto Pistol Item Type: Firearm Firearm / Accessory Action: Striker Fired Firearm / Accessory Capacity: 10 + 1 Finish: FDE Sights: Black Co-Witness Iron Sights Stock Frame Grips: Polymer Frame FDE Polymer Polymer Frame Magazine Quantity and Description: 2 10 rd. Overall Length: 7.4" Weight: 26.5 oz. Shipping Weight: 3.2 Feature: Interchangeable Backstraps Feature: FN Optics Mounting System Feature: Midsize Frame Optic Adjustable Objective: false Optic Reticle Illuminated: false