Description
The FN 66102318 502 MRD 22 LR 10+1 4″ Black Target Crown Barrel, Flat Dark Earth Optic Ready/Serrated Slide, Flat Dark Earth Polymer Frame w/Picatinny Rail, Textured Grip, Ambidextrous is a hammer-fired .22 LR pistol built for shooters who want to train like they fight. It combines a crisp trigger, low felt recoil, and a red-dot-ready slide in a package that feels just like a full-size duty gun. Per FN’s specs, the 4-inch target crown barrel delivers consistent accuracy shot after shot, while the Flat Dark Earth finish cuts glare and looks right at home on any bird hunt or range day.
| Manufacturer | FN America |
|---|---|
| Model | 502 MRD |
| Material | Flat Dark Earth Polymer Frame, Steel Slide |
| Compatibility | Multiple Micro Red Dot Optics via Low-Profile Mounting System |
| Finish | Flat Dark Earth Optic Ready/Serrated Slide, Black Target Crown Barrel |
| Weight | 22.4 oz (per manufacturer specs) |
| Condition | New |
Key Features
- Hammer-Fired Action – Why it matters: A hammer-fired system gives you a cleaner, more predictable trigger pull that helps you place fast, accurate rounds on target, especially when you’re working on your follow-up shots.
- Low-Profile Optics-Mounting System – Why it matters: Swap out the MRD insert plates to mount your favorite micro red dot without adding bulk, so you can transition from iron sights to a dot in minutes.
- Fully Ambidextrous Controls – Why it matters: Left-handed or right-handed, you get slide stop and magazine release on both sides. That means no fumbling, no retraining muscle memory.
- Picatinny Rail & Textured Grip – Why it matters: The rail lets you mount a light or laser for low-light training, and the textured grip keeps your hand locked in place even when your palms get sweaty on a hot dove field.
- 10+1 Capacity with Target Crown Barrel – Why it matters: Ten rounds of .22 LR give you plenty of trigger time between reloads, and the target crown barrel tightens your groups at 25 yards.
Who It’s For
This FN 502 MRD is for the shooter who wants a .22 LR pistol that mirrors the ergonomics and controls of a full-size duty gun. It’s perfect for bird hunters who want to practice on steel between seasons, for new shooters learning the fundamentals on a soft-kicking platform, and for experienced marksmen who need an affordable trainer that runs like a centerfire. The Flat Dark Earth finish fits right into a southern hunting kit.
Pros & Cons
| Pros | Cons |
|---|---|
| Excellent trigger for a .22 LR | Some users report initial break-in needed with certain bulk ammo |
| Fully ambidextrous controls | Optic plates sold separately |
| Low felt recoil, great for training | Slide serrations can be sharp on the thumb |
Comparison
| Feature | FN 502 MRD | Zev Technologies OZ9 | Lone Wolf Distributors Timberwolf |
|---|---|---|---|
| Caliber | .22 LR | 9mm | 9mm |
| Action | Hammer-fired | Striker-fired | Striker-fired |
| Optic Ready | Yes (low-profile system) | Yes | No |
| Ambidextrous | Yes | Yes | No |
| Price | $449 | $1,200+ | $450 |
FAQ
What micro red dots are compatible with the FN 502 MRD?
The FN 502 MRD uses a low-profile optics-mounting system with interchangeable insert plates. It accepts popular micro red dots like the Trijicon RMR, Holosun 407K/507K, and Shield RMSc. Plates are sold separately.
Is the FN 502 MRD reliable with standard .22 LR ammunition?
Yes, it runs well with high-velocity .22 LR ammo like CCI Mini-Mags. Some users note a break-in period of 200-300 rounds with bulk pack ammo. Stick to quality rounds for best performance.
Does the FN 502 MRD come with a threaded barrel?
No, this model features a 4-inch target crown barrel. If you need a threaded barrel for a suppressor, look for the FN 502 Tactical model.
Can left-handed shooters use the controls easily?
Absolutely. The slide stop and magazine release are fully ambidextrous, so lefties get the same operation as right-handed shooters without any modifications.
Call to Action
The FN 66102318 502 MRD 22 LR is ready to ship. Add it to your cart today and get a trainer that shoots like a centerfire, without the cost. Pair it with a red dot sight or a holster for a complete setup. Browse more semi-auto handguns in our store.
✅ Nationwide delivery (all 50 states)
✅ Ships 1-2 business days
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Last updated: April 2026
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