FN 509M Tactical Bundle 9mm, 4.5in Threaded Barrel, 5 Mags

Description

The FN 509M Tactical Bundle 9mm, 4.5in Threaded Barrel, 5 Mags delivers a midsize, optics-ready pistol right out of the box with enough magazines to run classes, matches, or duty shifts without stopping to reload. This package pairs a full-hand grip frame with suppressor-height night sights, a threaded barrel for muzzle devices, and FN’s Low-Profile Optics-Mounting System (LOMS) for micro red dots. At $798.66, it’s a value play that skips the usual upgrade costs.

Manufacturer	FN America
Model	509M Tactical Bundle
Material	Stainless steel barrel, polymer frame
Compatibility	9mm Luger, micro red dots (RMRcc, Holosun K series, Shield RMSc footprint)
Finish	Black nitride (barrel), black polymer (frame)
Weight	26.9 oz (unloaded, per manufacturer specs)
Condition	New

Key Features

• Threaded 4.5-inch barrel – WHY IT MATTERS: Lets you run a suppressor or compensator without aftermarket work, and the black nitride finish resists corrosion under heavy use.
• FN Low-Profile Optics-Mounting System (LOMS) – WHY IT MATTERS: Direct-mounts micro red dots like the Holosun 407K/507K or Trijicon RMRcc without adapter plates, keeping the slide low and co-witnessing with the suppressor-height night sights.
• Five 17-round magazines – WHY IT MATTERS: Two flush-fit, one extended (24-round), plus two more standard mags give you 85 rounds total out of the box—enough for two full USPSA stages or a long range session without reloading.
• Suppressor-height 3-dot night sights – WHY IT MATTERS: Tritium inserts let you acquire a sight picture in low light, and the tall profile clears most micro red dots for a true lower-1/3 co-witness.
• Midsize grip with full-hand length – WHY IT MATTERS: Accommodates all five fingers without printing harder than a compact, balancing concealability with control for faster follow-up shots.

Who It’s For

This bundle is built for shooters who want one pistol that does everything—carry, competition, home defense, and training. If you’re a duty or competition shooter who burns through ammo on weekends and needs a suppressor host that doesn’t require a gunsmith, this FN 509M Tactical fits. It also works for concealed carriers who want a threaded barrel and red dot capability without moving to a full-size frame.

Pros & Cons

• Pros: Optics-ready without plates (LOMS system), five magazines included, threaded barrel from the factory, suppressor-height night sights co-witness with most micro dots, balanced recoil impulse with 4.5-inch barrel, full grip length for larger hands.
• Cons: The trigger pull is around 6.5 lbs with some creep—shooters used to aftermarket triggers may want to swap it out. Also, the LOMS system only fits specific micro dot footprints (RMRcc, Holosun K series, Shield RMSc), not full-size RMR or SRO.

Comparison: FN 509M Tactical vs. Zev Technologies OZ9 vs. Agency Arms AOS G19

Feature	FN 509M Tactical Bundle	Zev Technologies OZ9	Agency Arms AOS G19
Price	$798.66	~$1,800	~$1,500
Barrel length	4.5 in (threaded)	4.49 in (threaded)	4.02 in (threaded optional)
Magazines included	5 (17 + 24 rd)	3 (17 rd)	3 (15 rd)
Optic system	LOMS (micro dot only)	ZEV slide cut (RMR/SRO)	Agents Optic System (multi-footprint)
Trigger	Factory 6.5 lbs	ZEV Pro 4-5 lbs	Agency trigger 4.5 lbs
Grip frame	Polymer, full-hand	Polymer/aluminum chassis	Polymer, compact

FAQ

Does the FN 509M Tactical come with a suppressor?

No, the bundle includes the pistol with a threaded 4.5-inch barrel, five magazines, suppressor-height night sights, and a hard case. You’ll need to purchase a suppressor separately if you want one.

What micro red dots are compatible with the LOMS system?

According to FN specs, the Low-Profile Optics-Mounting System accepts micro red dots with the Shield RMSc footprint, including the Holosun 407K/507K/EPS Carry, Trijicon RMRcc, and Swampfox Sentinel. It does not fit full-size RMR or SRO optics without an adapter plate.

How many rounds come with the five magazines?

The bundle includes two 17-round flush-fit magazines, two additional 17-round magazines, and one 24-round extended magazine—total capacity of 85 rounds out of the box.

Is this pistol good for concealed carry?

Yes, the midsize grip and 4.5-inch barrel make it viable for IWB carry with a good holster, though the threaded barrel adds about 0.5 inches of length. The full-hand grip may print more than a subcompact, but it’s manageable for most body types.

Can I use standard Glock 19 holsters with the FN 509M Tactical?

No, the FN 509M has a different trigger guard shape, slide profile, and rail system than a Glock 19. You’ll need holsters specifically molded for the FN 509 series, especially if running a suppressor-height sight or red dot.

Why Buy From Us

• ✓ Nationwide delivery (all 50 states)
• ✓ Ships 1-2 business days
• ✓ 30-day returns
• ✓ Secure checkout

Last updated: April 2026

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