Description
Most .22 LR pistols make compromises. The FN 502 Tactical doesn't. FN took everything that makes their 509 series stand out and built it into a rimfire package that's fully loaded from day one. The 4.6-inch steel barrel is threaded 1/2×28 with a recessed target crown, the slide is optics-ready with mounting plates for popular red dot footprints included, and the suppressor-height co-witness iron sights stay usable whether you run a dot or not. It's hammer-fired and single-action only, which is one of the reasons the trigger punches above its class for a rimfire pistol.
What the FN 502 Tactical Gets Right as a Rimfire Trainer
The controls are fully ambidextrous, including the safety, slide stop, and magazine release, and they're positioned identically to the FN 509. That's the whole point. If you carry or train with a 509, running the 502 Tactical keeps your muscle memory sharp at a fraction of the cost per round. The grip texture is aggressive enough to be useful without being rough, and the polymer frame has a solid feel with an integrated Picatinny rail under the dustcover for lights and lasers. A loaded chamber indicator gives you a quick tactile check, and the anodized aluminum slide feels far more substantial than most rimfire pistols.
FN 502 Tactical Suppressor and Optics Capability
The fixed barrel design is worth highlighting here because it's not common on pistols. Since the barrel doesn't tilt during cycling like a traditional locked-breech design, you can direct-thread any rimfire suppressor and it won't interfere with the action at all. No booster needed, no adapters required for most standard-diameter .22 cans. The gun cycles reliably suppressed straight out of the box. On the optics side, included mounting plates cover common micro red dot footprints so you're not chasing adapters after the fact. The blanking plate that ships installed in the slide keeps things clean if you prefer to run irons.
Reliability across different .22 LR ammo types is genuinely better here than most of the competition. The 502 Tactical isn't finicky, though like any rimfire pistol, keeping it clean and well-lubricated makes a real difference. The windowed magazines let you see round count at a glance, and the flush-fit 10-rounder keeps the grip compact while the 15-round extended mag gives you more to work with and fills out the grip nicely.
Key Specifications
- Manufacturer: FN America / FN Herstal
- MPN: 66-101011
- UPC: 845737013301
- Caliber: .22 LR
- Action: Single-Action Only (SAO), Semi-Auto
- Barrel Length: 4.6"
- Barrel Type: Steel, Fixed, Threaded 1/2×28 TPI, Recessed Target Crown
- Rifling Twist: 1:16" Right-Hand Twist
- Overall Length: 7.6"
- Height: 5.8"
- Width: 1.4"
- Weight (Unloaded): 23.7 oz.
- Capacity: 10+1
- Frame: Polymer with Picatinny Rail
- Slide: Anodized Aluminum, Optics-Ready, Front & Rear Serrations
- Sights: Suppressor-Height Co-Witness Iron Sights (Fixed)
- Safety: Ambidextrous Manual Safety
- Finish: Black
- Number of Magazines: 2 (1x 10-round, 1x 15-round)
What’s Included
- FN 502 Tactical pistol
- 1x 10-round flush-fit magazine
- 1x 15-round magazine
- 3x optics mounting plates (Trijicon RMR, Shield RMS, Docter footprints)
- Optics mounting hardware
- Blanking plate (installed)
- Standard-height front sight
- Knurled metal thread protector
- Hard case
- Owner's manual
Frequently Asked Questions
Will the FN 502 Tactical work with my 509 holster?
Not reliably. While the two pistols share a very similar profile, the 502 Tactical is a different enough shape that 509 holsters typically don't fit properly and retention will be off. You'll want a holster specifically molded for the 502 Tactical. The good news is that there are plenty of quality options available in Kydex and polymer from major holster makers.
Does the FN 502 Tactical require a booster or Nielsen device to run suppressed?
No, and that's one of the more practical features of this pistol. The 502 Tactical uses a fixed barrel rather than a tilting locked-breech design, so the suppressor doesn't need to cycle with the slide. You can direct-thread any standard rimfire suppressor onto the 1/2×28 TPI muzzle and the gun will function normally.
What red dot optics are compatible with the FN 502 Tactical?
The pistol comes with mounting plates for Trijicon RMR, Shield RMS, and Docter footprints, which covers a wide range of popular micro red dots right out of the box. Optics like the Holosun 507C, Vortex Venom, and Trijicon RMR all mount up using the included plates and hardware. The suppressor-height sights co-witness with low-profile dots, so you keep a usable iron sight picture regardless of which optic you choose.
Is the FN 502 Tactical picky about ammunition?
It's more forgiving than most blowback .22 LR pistols, which is saying something. Multiple independent reviewers noted it ran reliably across a wide range of bulk and standard-velocity loads. That said, like any rimfire semi-auto, it benefits from staying clean and properly lubricated, and the occasional bad rimfire primer is just part of life with .22 LR regardless of the platform.
How does the FN 502 Tactical compare to the FN 502 MRD?
The main differences are the barrel length and suppressor readiness. The Tactical gets the 4.6-inch threaded barrel and suppressor-height co-witness sights, while the MRD runs a shorter 4-inch non-threaded barrel. Both are optics-ready, but the Tactical is the one to get if you plan to run a can or want the extra barrel length. Magazine configuration also differs slightly by variant.
What is the trigger like on the FN 502 Tactical?
For a rimfire pistol, it's genuinely good. The single-action hammer-fired design gives it a cleaner break than most striker-fired .22s. Pull weight measures in the 4 to 5 pound range depending on the sample, and the reset is audible and tactile. It's not a target trigger, but it's a real step above what you typically find in this category.



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