FN Five-seveN MRD 5.7x28mm 4.8-inch Optic-Ready
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Expert review
About this product
The FN Five-seveN MRD is an optics-ready variant of FN's 5.7x28mm pistol platform designed for rapid optic mounting and low-recoil performance. This model maintains the Five-seveN's signature lightweight polymer frame and proprietary 20-round magazine capacity while adding modular optics capability without slide modification. The MRD designation refers to its Multi-Reticle Device readiness, achieved through FN's plate-based mounting system.
What is the FN Five-seveN MRD used for?
The Five-seveN MRD serves as a low-recoil duty or range pistol optimized for optical sighting systems. Its 5.7x28mm cartridge produces approximately 40% less felt recoil than 9mm NATO rounds while maintaining effective terminal performance. The 4.8-inch cold hammer-forged barrel provides consistent accuracy at 25-50 yard distances, making it suitable for both defensive use and precision shooting applications.
How does the FN Five-seveN MRD compare to the Ruger-57?
The Five-seveN MRD outperforms the Ruger-57 in optics readiness and barrel quality despite costing $300 more. FN's proprietary mounting system accepts Trijicon RMR, Holosun 507C, and Leupold DeltaPoint Pro footprints without gunsmithing, while the Ruger requires aftermarket plates. The MRD's chrome-lined, cold hammer-forged barrel maintains sub-2-inch groups at 25 yards compared to the Ruger's conventional button-rifled barrel that typically produces 3-inch groups.
What does it weigh and what are the dimensions?
The Five-seveN MRD weighs 21.2 ounces unloaded and measures 8.2 inches in length with a 4.8-inch barrel height of 5.7 inches. The polymer frame contributes to its lightweight profile while maintaining structural integrity under sustained fire. The grip width measures 1.45 inches, accommodating most hand sizes without requiring aftermarket backstraps like our Stevens 334 rifle.
Who is this NOT for?
The Five-seveN MRD isn't suitable for shooters seeking conventional caliber compatibility or budget-conscious buyers. The 5.7x28mm ammunition costs approximately $0.80 per round compared to $0.30 for 9mm, making sustained practice sessions economically challenging. Those preferring traditional iron sights without optics would better served by standard Five-seveN models or our Stevens 555 shotgun for clay shooting.
What's in the box?
The package includes the pistol, two 20-round magazines, three optic mounting plates (RMR, DPP, 507C), Torx wrench set, and cable lock. FN provides all necessary hardware for optic installation within 15 minutes using included tools. The case measures 12x8x3 inches and includes foam cutouts for each component, unlike some competitors that ship with single-magazine configurations.
Is the FN Five-seveN MRD worth it at $999?
At $999, the MRD justifies its price through superior optics integration and barrel construction compared to alternatives. The cold hammer-forged barrel provides 20,000-round service life versus 10,000 rounds on conventional barrels, while the optics system eliminates $100-150 in aftermarket mounting costs. For shooters committed to the 5.7x28mm platform who want optic readiness out of the box, this represents a logical investment.
Specs at a glance
Pros & cons
What works
- True optics-ready system with 3 included plates - eliminates $150+ in aftermarket costs
- Cold hammer-forged chrome-lined barrel - 20,000-round service life versus 10,000 on conventional barrels
- 21.2 ounce unloaded weight - 4 ounces lighter than all-steel 9mm alternatives
- Ambidextrous safety and 20-round capacity - fully configurable for left or right-handed shooters
Trade-offs
- 5.7x28mm ammunition costs $0.80/round - 2.6x more expensive than 9mm training ammunition
- No threaded barrel option - requires aftermarket modification for suppressor use ($250+)
- Polymer frame lacks stippling - requires $60-100 in aftermarket texturing for aggressive grip
Key attributes
| upc | 845737015046 |
| manufacturer | FN America / FN Herstal |
| manufacturer part number | 66-101274 |
| action | Semi-Auto |
| atf type | Pistol |
| barrel length | 4.8" |
| caliber/gauge | 5.7 x 28 mm |
| capacity | 20 |
| color | Black |
| length | 12.0500 |
| model | Five seveN |
| number of magazines | 2 |
| package height | 3.3 |
| package width | 11.0 |
| product type | Semi-Auto Pistol |
| safety | Ambidextrous |
| shipping weight | 3.5 |
| sights | Adj. Rear Combat Sight |
| sights type | ADJUSTABLE |
| slide description | Optic Ready/Serrated |
| 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 |
| units per box | 1 |
Frequently asked questions
- Is it compatible with Trijicon RMR optics?
- Yes, the MRD includes a specific mounting plate for Trijicon RMR footprints. Installation requires only the provided Torx wrench and takes approximately 5 minutes. The plate maintains proper ejection port clearance and doesn't require slide milling.
- Does it fit standard Five-seveN holsters?
- The MRD fits most Five-seveN holsters despite the optic cut. The slide width remains identical at 1.2 inches, though some optics may require open-top designs. We recommend Blackhawk T-Series or Safariland 578 models for secure retention.
- How long does shipping take to Montana?
- FFL shipments to Montana typically require 3-5 business days processing plus 2-day transit. All firearms ship via UPS with adult signature required. We coordinate directly with your local FFL holder for transfer completion.
- Can I return it if it doesn't fit my hand?
- Firearms sales are final once transferred through an FFL due to federal regulations. We recommend handling the standard Five-seveN at a local dealer before purchase. The grip circumference measures 5.9 inches for reference.