FN 545 MRD Comp .45 ACP FDE, 10rd, 2 Mags
About this product
What is the FN 545 MRD Comp .45 ACP FDE? It's a striker-fired semiautomatic pistol chambered in .45 ACP with an integrated compensator and optics-ready slide designed for improved controllability and modular sighting capability. The Flat Dark Earth polymer frame houses a stainless-steel slide pre-milled for multiple red dot footprints, shipping with two 10-round magazines to accommodate capacity-restricted jurisdictions.
What is the FN 545 MRD Comp used for?
This pistol serves duty, range training, and compensated carry roles where .45 ACP stopping power matters but controllability is critical. The auto-indexing compensator reduces muzzle flip by up to 35%, making rapid follow-up shots more manageable than uncompensated .45s like the Springfield XD-M Elite, while the 10-round capacity meets state compliance without modification.
How does the FN 545 MRD Comp compare to the Glock 41?
The FN 545 MRD Comp outperforms the Glock 41 in recoil management due to its integrated compensator, though it sacrifices 3 rounds of capacity (10 vs 13). Where the Glock 41 relies on its longer sight radius for accuracy, the FN prioritizes optic compatibility and reduced muzzle rise—better for shooters who value fast target reacquisition over raw magazine capacity.
What does it weigh and what are the dimensions?
Unloaded weight is 30 ounces with an overall length of 8.2 inches and a height of 5.7 inches to the top of the sights. The barrel measures 4.7 inches, including the compensator's forward extension, which adds roughly 0.8 inches beyond a standard FN 545 slide.
Who is this NOT for?
Avoid this if you need maximum concealability or reside in free-capacity states—the compensator adds bulk, and 10-round magazines are restrictive compared to standard 13-round FN 545 mags. Consider the Stevens 334 in .308 Win for hunters or the Stevens 555 Sporting 20 Gauge for clay sports instead.
What's in the box?
You get the pistol, two 10-round magazines, three interchangeable backstraps (small, medium, large), optic mounting plates for RMR, DeltaPoint Pro, and Shield RMSc footprints, a cable lock, and the factory manual. No optic or suppressor-height sights are included—plan another $150-$600 for those.
Is the FN 545 MRD Comp worth it at $949?
At $949, it justifies its price if you need a compliant .45 ACP with built-in compensation and optics readiness out of the box. You’re paying roughly $200 over a base FN 545 for the compensator and optic system, which would cost $300+ to add aftermarket—a net saving if those features align with your use case.
Specs at a glance
Video review
Pros & cons
What works
- Integrated compensator reduces muzzle flip by 35%—measurable improvement over uncompensated .45s
- Optic-ready slide supports RMR, DPP, and RMSc footprints without milling—saves $200-$300 aftermarket
- Weighs 30 oz unloaded—balances well for a compensated .45 ACP duty pistol
- Includes two 10-round magazines—compliance-ready for restricted states out of the box
Trade-offs
- 10-round capacity only—restrictive compared to standard 13-round FN 545 magazines
- Compensator adds 0.8 inches to overall length—limits holster compatibility and concealability
- No suppressor-height sights included—co-witness requires aftermarket purchase ($80-$120)
- Flat Dark Earth finish shows holster wear faster than black nitride—expect visible scratching after 200 draws
Expert review
Key attributes
| upc | 845737019150 |
| manufacturer | FN America / FN Herstal |
| manufacturer part number | 66-102138 |
| action | Striker Fired |
| barrel length | 4.43" |
| caliber/gauge | .45 ACP |
| capacity | 10 + 1 |
| color | Flat Dark Earth |
| length | 12 |
| number of magazines | 2 |
| safety | No Manual |
| sights type | FIXED |
| slide description | Optic Ready/Serrated |
| state restriction (ca) | NO DIRECT SHIP TO CALIFORNIA |
Frequently asked questions
- Is it compatible with Trijicon RMR?
- Yes, it includes a specific mounting plate for Trijicon RMR footprint optics. The FN Low-Profile Optics-Mounting System uses included Torx screws and requires no gunsmithing—install time is under 5 minutes with proper torque (15-18 in-lbs).
- Does it fit standard FN 545 holsters?
- No, the compensator adds 0.8 inches of length and requires an open-front holster. We recommend Blackhawk T-Series L3D or Safariland 7380 ALS models—both accommodate comped pistols and have a 4-6 week lead time for custom orders.
- How long does shipping take?
- FFL transfers ship within 2 business days via UPS Ground, arriving in 3-5 days depending on your zone. Signature required upon delivery—no exceptions due to ATF regulations.
- Can I return it if it doesn't fit?
- Firearms are final sale per Ironclad Armory policy—no returns once the transfer is complete. Inspect at your FFL before completing paperwork; defects are handled via FN Herstal's 5-year warranty directly.