Darmok Firearms

FN 509M Tactical 9mm FDE | 4.5″ | Holosun 407C | 66101938

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FN 509M Tactical 9mm with a 4.5″ threaded barrel in Flat Dark Earth. Includes Holosun 407C red dot, one 15-round and one 24-round magazine, and two backstraps for adjustable fit.

The FN 509M Tactical is a midsize, optics-ready semi-automatic pistol built on FN’s 509 platform and finished in Flat Dark Earth. It ships with a Holosun 407C red dot sight installed and includes one 15-round and one 24-round magazine. The 4.5-inch threaded, cold hammer-forged barrel and optic-ready slide prioritize adaptable use for range training and competition/practical accuracy work.

For pairing, the included Holosun 407C is a suitable reflex optic that stays well under a $1,000 ceiling and complements the pistol’s low-profile optics mounting system. The firearm’s threaded 1/2×28 barrel also supports common 9mm suppressor mounts when legal and appropriate.

Product Specifications

  • The UPC is 845737018429.
  • The caliber is 9mm.
  • The barrel measures 4.5 inches and is cold hammer-forged with a recessed target crown.
  • The barrel features a muzzle thread pattern of 1/2×28.
  • The pistol includes a Holosun 407C reflex sight.
  • The package contains one 15-round and one 24-round magazine.
  • The frame material is polymer with a Flat Dark Earth finish.
  • The slide is described as optic cut/serrated and accepts multiple optic footprints.
  • The action type is Semi-Auto.
  • The sighting system includes Holosun 407C and suppressor-height night sight elements on the slide cover.
  • The firearm includes interchangeable backstraps for fit adjustment.
  • The trigger type is a flat face design.

Out of stock

SKU: ORI|66903 Category: Brand:

Product Information

SKU ORI|66903
UPC 845737018429
Manufacturer FN America / FN Herstal
Manufacturer Part Number 66-101938
Action Semi-Auto
Barrel Finish Black
Barrel Length 4.50"
Caliber/Gauge 9mm
Capacity 24
Number of Magazines 2
Rate of Twist 1:10" RH
Safety No
Shipping Weight 4.1
Sights Type 3-Dot Night/Suppressor Height
Slide Description Optic Cut/Serrated
Thread Pattern 1/2"-28
ATF Type Pistol
Length 12.5
Package Height 3.3
Package Width 11.2
Product Type Semi-Auto Pistol
Sights Holosun 407C
UPC845737018429
ManufacturerFN America / FN Herstal
Manufacturer Part Number66-101938
ActionSemi-Auto
Barrel FinishBlack
Barrel Length4.50"
Caliber/Gauge9mm
Capacity24
Number of Magazines2
Rate of Twist1:10" RH
SafetyNo
Shipping Weight4.1
Sights Type3-Dot Night/Suppressor Height
Slide DescriptionOptic Cut/Serrated
Thread Pattern1/2"-28
ATF TypePistol
Length12.5
Package Height3.3
Package Width11.2
Product TypeSemi-Auto Pistol
SightsHolosun 407C
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