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The FN 509M Tactical has a clear purpose: give you a capable, adaptable 9mm that's ready for serious use without a bunch of aftermarket work before you can run it the way you actually want to. That starts with a 4.5-inch cold hammer-forged stainless steel barrel threaded 1/2×28, so you can mount a suppressor or compensator without any gunsmithing. The frame is a midsize format, which means you get a full grip on the gun and genuine 24+1 capacity from the extended magazines, while still keeping the overall footprint manageable for carry or duty holsters.
FN's patented Low-Profile Optics Mounting System is one of the better plate systems in the industry — it lets you mount more than ten different miniature red dot optics without milling the slide, and the whole setup co-witnesses naturally with the factory suppressor-height 3-dot night sights. That's a genuinely useful combination. When you add an optic, you still have your iron sights as a backup. When you're running a can, the raised sights clear the tube so you're not shooting blind. The slide also includes front and rear cocking serrations, and the frame features a MIL-STD-1913 rail for lights or lasers if you go that route. Controls are fully ambidextrous, so lefties aren't leaving anything on the table.
The trigger runs around 4.5 to 6.7 pounds with a clean enough break for duty and defensive use. The frame includes interchangeable backstraps so you can dial in the grip fit, and the aggressive texturing gives you real purchase under recoil without being uncomfortable on bare skin.
The bundle ships with five magazines total: four 24-round extended mags and one 15-round flush-fit mag. The 15-rounder gives you a cleaner profile for carry, while the 24-rounders make range sessions and high-round-count training a lot more practical. Having five mags out of the box is a real benefit — you're not hunting for extra capacity or making an immediate follow-up purchase just to run a full course of fire. The PVD black finish on the slide is durable and purpose-matched to the rest of the package.
FN's patented Low-Profile Optics Mounting System supports more than ten commercially available miniature red dot optics using the included plate adapters — no slide milling required. Popular choices include the Trijicon RMR, Holosun 507C, and Leupold DeltaPoint Pro, all of which use the RMR footprint plate that comes with the pistol. The system is also designed to remain adaptable to future optics releases, so you're not locked into a specific footprint permanently.
Yes — the 4.5-inch barrel is threaded 1/2×28, which is the standard pitch for the majority of 9mm suppressors on the market today. The factory suppressor-height 3-dot night sights are tall enough to give you a clear sight picture over most cans, and the thread protector includes an o-ring to keep it from walking off during use. You can run it suppressed right out of the box without any additional parts or modifications.
The 15-round magazine provides a flush fit with the grip frame, making it a better option when you want a cleaner profile for carry or concealment. The four 24-round extended magazines add a grip extension and significantly more round count, which is practical for range use, training, or duty applications where reloads need to be minimized. Having all five in the box means you can run the gun in whichever configuration suits the situation without buying additional mags separately.
It depends on your frame and holster setup, but the 509M Tactical is purpose-built as a midsize platform — smaller than a full-size duty pistol, but with a full-hand grip and genuine capacity. FN markets it specifically for concealed carry, home defense, and duty use. The 7.9-inch overall length and 27.9-oz unloaded weight are workable for most IWB or OWB carry rigs, though the threaded barrel adds some length up front that you'll want to account for when choosing a holster.
No — the FN 509M Tactical uses a striker-fired action with a trigger safety only, similar to the approach used by Glock and many other modern duty pistols. There is no external manual thumb safety. The trigger safety is a blade integrated into the trigger face that must be fully depressed for the gun to fire, which is the standard safe-action design for this type of platform.
Holsters are specific to the FN 509 Midsize Tactical, and several major manufacturers make dedicated options for it, including Safariland, Blackhawk, and various Kydex custom makers. Because of the threaded barrel and optics mounting system, you'll want a holster that's cut for the 509 Tactical variant specifically, not the standard 509 or 509 MRD. If you plan to run a weapon light, look for holsters that accommodate both the light and the optic simultaneously.
| UPC | 845737017415 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | 66-101711 |
| Action | |
| ATF Type | Pistol |
| Barrel Length | 4.5" |
| Caliber/Gauge | 9mm |
| Capacity | 24 |
| Color | Black |
| Length | 12.1000 |
| Model | |
| Number of Magazines | 5 |
| Package Height | 3.2 |
| Package Width | 11.2 |
| Product Type | Striker Fired |
| Safety | Non-Manual Safety |
| Shipping Weight | 4.7 |
| Sights | Suppressor-Height 3-Dot NS |
| Sights Type | Night Sights |
| State Restriction (CA) | NO DIRECT SHIP TO CALIFORNIA |
| State Restriction (IL) | NO SALE TO ILLINOIS PICA |
| State Restriction (OR) | NO SALE TO OREGON |
| State Restriction (RI) | NO DIRECT SHIP TO RHODE ISLAND |
| State Restriction (WA) | NO DIRECT SHIP TO WASHINGTON |
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