PRODUCT DESCRIPTION PRODUCT SPECIFICATIONS FN 510 MRD 10MM FDE 10+1 407C Manufacturer: FN Model: FN 510 MRD Holosun Rate of Twist: 1-in-16" Color: Polymer Frame Flat Dark Earth Polymer Polymer Frame Barrel Length: 4.1" Caliber: 10mm Finish: Flat Dark Earth UPC: 845737018276 Action: Striker Fired Capacity: 10 + 1