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66-100465 FN 509M Mid-Size w/ Night Sights & 3 15rd Magazines

Manufacturer: FN
SKU: FN66-100465
Manufacturer part number: 66-100465
UPC: 845737010034
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No shipments to California or Cook County, IL.


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.

General Specs:

  • 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 green tritium night sight


  • Easily racked, combat-style sights
  • External extractor; loaded chamber indicator
  • Improved front and rear cocking serrations


  • Cold hammer-forged stainless steel
  • Recessed target crown
  • Polished chamber and feed ramp


  • Polymer construction with replaceable steel frame/slide rails
  • Enhanced grip texture which enables faster follow-up shots in all conditions
  • Interchangeable backstraps
  • MIL-STD-1913 accessory mounting rail
  • Improved flatter face trigger

Operating Controls:

  • Fully ambidextrous slide stop lever and magazine release


Caliber: 9mm

Operation: Double-action

Mag Capacity: 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 - 7.5 lb.

Sight Radius: 5.79"