FN 509 Tactical 9mm | 4.5in Threaded | 17/24rd | 66100375

The FN 509 Tactical is a full-size 9mm service pistol built on the FN 509 platform and fitted with FN’s Low-Profile Optics Mounting System and suppressor-ready features. It uses a cold hammer-forged 4.5 inch stainless steel barrel with 1/2×28 threads and an O-ring thread cap. The slide accepts multiple miniature red-dot footprints and co-witnesses with suppressor-height night sights while retaining a protective slide cap for iron-sight use. This configuration ships with one 17-round and one 24-round magazine and an FN soft pistol case.

For an optic under $1000 that pairs well with the FN low-profile footprint, consider a Trijicon RMR Type 2 or a comparable multi-footprint MRD; these optics work well with the pistol’s sighting setup and allow co-witness with the suppressor-height sights.

Typical applications include duty use where durability and sight options matter, and competition/practical shooting where capacity and rapid follow-up shots are beneficial.

Product Specifications

• The caliber is 9mm.
• The action is Semi-Auto.
• The barrel measures 4.5 inches and is cold hammer-forged.
• The barrel thread pattern is 1/2×28 with an O-ring retention thread cap.
• The pistol ships with one 17-round and one 24-round magazine.
• The slide is described as Optic Ready/Serrated stainless steel with a sight-protecting slide cap.
• The sights are Suppressor-Height Night Sights that co-witness with compatible MRDs.
• The frame material is Polymer with interchangeable backstraps and enhanced grip texture.
• The firearm weight is 27.9 oz.
• The overall length is 7.9 inches.
• The pistol includes FN Low-Profile Optics Mounting System and ambidextrous slide stop and magazine release features.
• The twist rate is 1:10.
• The listed trigger pull range is 5.5–7.5 lb.
• The optic footprint supports MULTIPLE MRD patterns.
• The UPC is 845737010119.

The FN 509 Tactical combines a durable, service-oriented platform with factory threads, an optics-focused slide, and a magazine set that maximizes capacity options for range, duty, or competition use. Its combination of polymer frame ergonomics, a cold hammer-forged barrel, and the Low-Profile Optics Mounting System make it a practical choice for shooters who want a suppressor-ready, optic-capable full-size 9mm pistol.

Related Videos: