FN 509® Midsize



  • Caliber: 9mm
  • Operation: Double-action
  • Mag Capacity: 10 or 15 Rd.
  • Weight: 26.5 oz.
  • Barrel Length: 4.0″
  • Overall Length: 7.4″
  • Twist Rate: 1:10″ RH
  • Height: 5.2″
  • Width: 1.35″
  • Trigger Pull: 5.5 – 7.7 lb.
  • Sight Radius: 5.79″

Primary Features

Full-sized performance in a concealed carry package

Striker-fired autoloader

Double-action operation

Fully ambidextrous controls

Offered as a non-manual safety model

Fixed 3-dot luminescent sights (standard)

Fixed 3-dot green tritium night sight available (LE ONLY)

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Upgrade your EDC with the FN 509® Midsize. This ideal combination of a four-inch slide and barrel with a midsize frame retains full-sized pistol performance in an easily-concealed package. The 9mm pistol ships standard with 15-round capacity and is compatible with all FN 509 magazines with use of a sleeve. 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.

Learn More

FN 509® Midsize Sell sheet

66-100463 FN 509M NMS BLK/BLK DS 2X15 845737010010
66-100464 FN 509M NMS BLK/BLK DS 2X10 845737010027
66-100465 FN 509M NMS BLK/BLK NS 2×15 LE 845737010034
20-100348 FN 509M 9MM Mag 15RD BK 845737010126
20-100349 FN 509M 9MM Mag 10RD BK 845737010386
20-100032-3 FN 509 9mm Mag 24RD 845737009793