FirearmsFnhSold by Fin Feather Fur Outfitters

Fnh

FN 509M T Promo 9mm4.5" Barrel FDE/FDE 1X15+1X24+3X24 mags

Our editorial team reviews specifications, product data, and field-use information to keep pages accurate.

Mid-size Fn

509M Tactical semi-automatic pistol chambered

4.5-inch Threaded

Barrel with 1/2x28 threading

Optic-ready Configuration

For accessory mounting

Suppressor-height 3-dot

Night sights included

Flat Dark

Earth polymer frame and matching

$929.99
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SKU: FN 66-101709-845737017392

Overview

Built for shooters who want a duty-oriented 9mm pistol with suppressor and optic compatibility, this mid-size model combines a 4.5-inch threaded barrel with an optic-ready slide and suppressor-height 3-dot night sights. The flat-faced trigger and striker-fired, semi-automatic action support a clean, modern setup for range work or defensive use, while the Flat Dark Earth polymer frame keeps the profile consistent across the pistol. It ships with five magazines, including both 15-round and 24-round options, along with a ballistic case and two backstraps for fit adjustment. The package is well suited to users who want a configurable handgun without adding aftermarket parts right away.

Why Hunters Choose the Fnh

Optic-ready Configuration

Supports flexible sighting setup for

Threaded 4.5-inch

Barrel is included for suppressor-compatible

Comes Five

Five magazines: one 15-round and

Suppressor-height 3-dot

Night sights are already installed

Flat-faced Trigger

Striker-fired action provide a straightforward

Key Features

  • Mid-size FN 509M Tactical semi-automatic pistol chambered in 9mm Luger.
  • 4.5-inch threaded barrel with 1/2x28 threading.
  • Optic-ready configuration for accessory mounting.
  • Suppressor-height 3-dot night sights included.
  • Flat Dark Earth polymer frame and matching slide finish.
  • Includes five magazines: one 15-round and four 24-round.
  • Comes with a ballistic case and two backstraps.

Best Used For

  • Hunters wanting a mid-size 9mm pistol with optic-ready setup for range practice and training.
  • Users planning suppressor use who need a threaded barrel and suppressor-height night sights.
  • Shooters who prefer a flat-faced trigger and striker-fired manual of arms.
  • Those wanting multiple magazines included for extended practice sessions or setup flexibility.
  • Buyers seeking a polymer-frame pistol with Flat Dark Earth finish and included backstraps for fit adjustment.

Specifications

Accessories5 Magazines
ActionStriker Fired
Barrel Length4.5"
Barrel Length In Inches4.5
Barrel TypeThreaded
Blade FinishPVD
Caliber9mm Luger (9x19 Parabellum)
Capacity24
DescriptionOptic Ready
Dimensions3.45 X 11.10 X 12.10
FinishcolorPVD
Frame ColorFlat Dark Earth
Frame MaterialPolymer
Grip MaterialPOLYMER
IncludesBallistic Case and (2) Backstraps
Magazine Capacity24
Magazine ConfigurationOne 15 rd. and four 24 rd.
ManufacturerFn
ModelFN509M
Number Of Magazines Included5
Optic ReadyYes
SafetyNon-Manual Safety
SightsSuppressor-Height 3-Dot NS
SizeMid-Size
Slide ColorFLAT DARK EARTH
Thread Pattern1/2x28"
TriggerFlat Faced Trigger
TypeStriker Fired
Type Action FunctionSEMI-AUTO
Type Of SightsNIGHT SIGHTS
Weight In Ounces26.5

Pros

  • Optic-ready configuration supports flexible sighting setup for the FN509M Tactical.
  • Threaded 4.5-inch barrel is included for suppressor-compatible use.
  • Comes with five magazines: one 15-round and four 24-round.
  • Suppressor-height 3-dot night sights are already installed.
  • Flat-faced trigger and striker-fired action provide a straightforward control layout.
  • Includes a ballistic case and two backstraps for storage and fit adjustment.

Considerations & Trade-offs

  • Includes a mix of one 15-round magazine and four 24-round magazines, so carry and range use may require different magazine choices depending on your setup.
  • The threaded 4.5" barrel and suppressor-height night sights are geared toward accessory use, which may be more than needed for a simple, streamlined pistol.
  • Optic-ready configuration adds flexibility, but it also means the pistol is set up for users who plan to mount an optic rather than those who prefer a bare slide.
  • The mid-size polymer frame and flat-faced trigger may suit a broad range of shooters, but the included backstraps indicate fit should still be checked for personal comfort.

Suggested Comparisons

  • Mid-size 9mm striker-fired pistol
  • Optic-ready semi-automatic pistol
  • Threaded-barrel pistol
  • Suppressor-height night-sight pistol

Suggested Accessories

  • Pistol case
  • Optic mounting accessories
  • Suppressor accessories
  • Extra magazines

Frequently Asked Questions

What comes included with the FN 509M Tactical Promo package?

The listed package includes 5 magazines total: one 15-round magazine and four 24-round magazines. It also includes a ballistic case and two backstraps.

Is this FN 509M Tactical optic ready?

Yes. The product data lists it as optic ready.

Does this pistol have a threaded barrel for suppressor use?

Yes. The barrel is listed as threaded 1/2x28." The data also lists suppressor-height 3-dot night sights.

What caliber and action type does this model use?

It is chambered in 9mm Luger (9x19 Parabellum) and uses a striker-fired, semi-automatic action.

Are there any manual safety controls on this pistol?

The product data lists it as non-manual safety, so no manual safety is specified.