FN Reflex MRD 9mm 3.3in 15rd FDE (2 Mags)
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Expert review
About this product
The FN Reflex MRD 9mm is a micro-compact, optics-ready semi-automatic pistol purpose-designed for deep concealment carry that pairs a 3.3-inch cold hammer-forged barrel with a refined single-action trigger and a slim polymer frame in Flat Dark Earth. As FN's first micro-compact striker-alternative platform, it represents a significant entry into the deep-carry market dominated by direct-blowback and striker-fired designs. Its inclusion of both an 11-round and a 15-round magazine directly addresses the capacity-versus-print trade-off that defines this category.
What is the FN Reflex MRD used for?
This pistol is engineered primarily for deep concealment and everyday carry where minimizing print is the primary objective. The 6.20-inch overall length and 18.5-ounce unloaded weight allow it to disappear in an appendix or strong-side holster, even under light clothing. Its single-action-operating internal hammer trigger provides a predictable, consistent break that aids in split times for defensive scenarios, and the optics-ready slide ensures rapid threat acquisition can be upgraded from the factory-installed tritium front dot.
How does the FN Reflex MRD compare to the SIG Sauer P365?
The FN Reflex MRD offers a significantly different trigger mechanism and potentially superior out-of-the-box optics mounting compared to the striker-fired SIG P365. Where the P365 relies on its proven striker system with a hinged trigger, the Reflex utilizes a fully internal hammer-fired single-action (SAO) design, resulting in a cleaner 5-pound pull weight with less pre-travel than many striker systems. For shooters who prioritize a 1911-esque trigger feel in a micro-compact, the Reflex is objectively better, though it sacrifices some of the P365's vast aftermarket ecosystem for holsters and accessories.
What does it weigh and what are the dimensions?
The FN Reflex MRD has an unloaded weight of 18.5 ounces and measures 6.20 inches in overall length, 4.17 inches in height with the 11-round magazine, and 0.94 inches in width at its slide. The 3.3-inch barrel is cold hammer-forged with an 11-degree target crown, which aids in accuracy by ensuring consistent bullet exit. These dimensions place it squarely in the micro-compact class, making it lighter than many alloy-frame competitors like the Springfield Hellcat Pro but with a slightly wider slide profile.
Who is this NOT for?
This pistol is not for shooters seeking a range-dedicated target pistol or a duty-sized firearm for overt carry. The short sight radius and snappy felt recoil of the 3.3-inch barrel make sustained, precise fire at distances beyond 25 yards more challenging than with a full-sized service pistol like those in the Stevens 334 rifle line, designed for different applications. It's also a poor choice for anyone unwilling to regularly train with and maintain a hammer-fired system, which requires more specific knowledge of its sear and hammer interface than a simple striker.
What's in the box?
You receive the FN Reflex MRD pistol, two magazines (one 11-round flush-fit and one 15-round extended), a polymer optic cover plate for the Shield RMSc/Holosun K-series cut, a cable lock, and the standard owner's manual with warranty card. Notably absent is a hard case—it ships in a cardboard box with foam inserts—and any tool for adjusting the co-witness iron sights, which require a specialized hex wrench not commonly found in general armorer kits.
Is the FN Reflex MRD worth it at $571.99?
At $571.99, the Reflex MRD represents a competitive value for a duty-grade, optics-ready micro-compact with an advanced trigger system. You are paying for FN's military-spec cold hammer-forging process, a superior two-magazine package, and a tritium front sight that would cost $100+ to add aftermarket. When compared to building an equivalent optic-ready micro-compact from a base model and adding these features, the price is justifiable for the serious concealed carrier who values mechanical refinement over absolute budget, much like the shooter who selects a dedicated over-under shotgun for sport knows they are investing in precision.
Specs at a glance
Pros & cons
What works
- Optics-ready slide cut for Shield RMSc/Holosun K-series - accepts top optics without a plate
- Includes both 11-round and 15-round magazines - provides immediate capacity flexibility
- Internal hammer-fired SAO trigger with a consistent 5-pound pull - offers a cleaner break than most striker-fired micro-compacts
- Tritium front sight insert - provides immediate low-light aiming reference
Trade-offs
- Proprietary sight dovetail - limits aftermarket night sight options compared to Glock or SIG patterns
- No included hard case - ships in cardboard/foam which offers minimal long-term storage protection
- Snappy recoil impulse from the 3.3-inch barrel - requires more grip discipline than a 4-inch compact
Key attributes
| upc | 845737016258 |
| manufacturer | FN America / FN Herstal |
| manufacturer part number | 66-101411 |
| action | Single Action |
| atf type | Pistol |
| barrel finish | Black |
| barrel length | 3.30" |
| caliber/gauge | 9mm |
| capacity | 15 + 1 |
| color | Flat Dark Earth |
| length | 11.2500 |
| model | Reflex |
| number of magazines | 2 One 11 rd. and One 15 rd. |
| package height | 2.25 |
| package width | 8.125 |
| product type | Semi-Auto Pistol |
| safety | No |
| shipping weight | 2.1 |
| sights | 3 Dot |
| sights type | Steel Dovetail Tritium Front/Double-Dot Rear |
| slide description | Optic Ready/Serrated |
| state restriction (ca) | NO DIRECT SHIP TO CALIFORNIA |
| state restriction (or) | NO SALE TO OREGON |
| state restriction (ri) | NO DIRECT SHIP TO RHODE ISLAND |
| state restriction (wa) | NO DIRECT SHIP TO WASHINGTON |
Frequently asked questions
- Is the slide cut compatible with a Holosun 407K?
- Yes, the FN Reflex MRD slide is cut for the Shield RMSc footprint, which directly accepts the Holosun 407K, 507K, and EPS Carry optics without an adapter plate. Mounting requires four M3x0.5mm screws of the correct length, typically provided with the optic. Improper screw length is the primary cause of slide or extractor damage during installation.
- Does this fit in a P365 holster?
- No, the FN Reflex MRD will not fit securely in a holster molded for a SIG Sauer P365. The Reflex has a distinct slide profile, trigger guard geometry, and a width of 0.94 inches versus the P365's 1.0 inches. You must use a holster specifically designed for the FN Reflex model; brands like Tulster and ANR Design produce Kydex options with a 4-6 week lead time.
- How many rounds does the flush magazine hold?
- The included flush-fit magazine holds 11 rounds of 9mm Luger, bringing the pistol's minimum carry capacity to 12 rounds total (11+1 in the chamber). The extended magazine increases this to 15+1 rounds. Both magazines use a steel body with a polymer follower and are marked for caliber on the base plate.
- Can the tritium front sight be swapped?
- Yes, the tritium front sight is a dovetail installation, but it is a proprietary FN pattern that requires a specific sight pusher tool or armorer service. The insert has a standard glow intensity with a half-life of approximately 12 years. Aftermarket night sights from brands like Trijicon or AmeriGlo are available but require confirmation of dovetail compatibility.