SEASON of SAVINGS: OCTOBER 1ST, 2024 THRU 12-31-2024   $100 REBATE.  This evolution of the FN 509 Midsize, now featuring the FN Low Profile Optics Mounting System, gives you the option of direct mounting more than 10 different miniature red dot optics to your concealed carry pistol. The FN 509 Midsize MRD features a four-inch barrel and slide with optics mounting package, a midsized frame, and 10-round capacity. The improved controls aid in manipulation, the new improved texturing on the two included backstraps provides better recoil management, and a new flatter faced trigger allows for more controllable trigger press and cleaner break.

  • BARREL: 4"
  • OVERALL LENGTH: 7.4"
  • CAPACITY: 15 + 1
  • # OF MAGAZINES: 2
  • MAG DESCRIPTION: 15 rd.
  • SIGHTS: Black Co-Witness Iron Sights
  • SIGHT TYPE: Fixed Sights
  • OPTICS READY CUT
  • WEIGHT: 26.5 oz.
  • SHIPPING WEIGHT: 3.2 lbs.
  • CASE: FN Soft Case
  • ADDL INFO: Interchangeable Backstraps
  • ADDL INFO: FN Optics Mounting System
  • ADDL INFO: Midsize Frame
  • MFG MODEL NO: 66-100741