FN 545 MRD Comp .45 ACP 15rd FDE 2 Mags

Description

The FN 545 MRD Comp .45 ACP 15rd FDE 2 Mags is a striker-fired, full-size .45 ACP pistol built for shooters who demand control and capacity. This package includes two 15-round magazines and a durable Flat Dark Earth finish across the polymer frame and slide. Designed for practical use, it ships with FN’s low-profile MRD mounting system and multiple adapter plates for miniature red dot optics.

Manufacturer	FN America
Model	545 MRD Comp
Material	Stainless steel slide, polymer frame (per manufacturer specs)
Compatibility	Miniature red dot optics (RMR, Holosun, Shield RMS, etc.)
Finish	Flat Dark Earth (FDE)
Weight	29.5 oz (unloaded, per manufacturer specs)
Condition	New

Key Features

• MRD Slide Cut with Multi-Plate System – Why it matters: you can mount most popular miniature red dots without aftermarket machining or adapters, saving time and money.
• 15-Round Magazine Capacity (2 Included) – Why it matters: you get 15+1 rounds of .45 ACP, giving you more firepower than standard 10-round models while staying manageable for duty or range use.
• Flat Dark Earth Finish – Why it matters: the FDE coating resists corrosion and glare, making it ideal for low-light conditions and outdoor carry.
• Interchangeable Backstraps – Why it matters: you can tailor the grip angle and palm swell to your hand size, improving recoil control and shot-to-shot consistency.
• Optic-Co-Witnessing Iron Sights – Why it matters: you retain a backup aiming solution if your red dot fails, so you stay in the fight without missing a beat.

Who It’s For

This pistol is for the shooter who wants a .45 ACP that runs flat and fast. It’s built for competition shooters needing high capacity in Limited or Heavy divisions, law enforcement officers who prefer .45 ballistics, and civilians who want a reliable home-defense handgun with red dot compatibility out of the box. If you’ve struggled with .45 muzzle flip, the compensated slide and ergonomic grip make it easier to stay on target.

Pros & Cons

• Pro: The 15-round magazine capacity is among the highest for a factory .45 ACP pistol—you’re getting two extra rounds over most competitors.
• Pro: The MRD mounting system uses four adapter plates, so you can swap between RMR, Holosun K, Shield RMS, and Docter footprints without buying extra hardware.
• Con: The slide is slightly heavier than some polymer-framed .45s due to the full-length steel construction, which can feel sluggish during rapid slide manipulations. Per FN America specs, the slide weight is 12.8 oz, but that mass also helps absorb recoil.

Comparison

Feature	FN 545 MRD Comp	Glock 21 Gen5 MOS	Smith & Wesson M&P45 M2.0
Caliber	.45 ACP	.45 ACP	.45 ACP
Magazine Capacity	15 rounds	13 rounds	10 rounds
Slide Cut	MRD (multi-plate)	MOS (4 plates)	No (optic-ready models available)
Finish	FDE	Black Tenifer	Black Armornite
Weight (unloaded)	29.5 oz	25.9 oz	29.1 oz
Price (MSRP)	$949	$699	$679

FAQ

Is the FN 545 MRD Comp optics-ready out of the box?

Yes. The slide is pre-cut for miniature red dots and includes four adapter plates for RMR, Holosun K, Shield RMS, and Docter footprints. You just need to buy the optic and screws.

Does the FDE finish wear off quickly?

No. FN uses a durable cerakote-type finish on the slide and a polymer frame that’s molded in FDE. With normal holster use, you’ll see holster wear marks over time, but the finish holds up well compared to painted slides.

Can I use standard .45 ACP ammunition, or does it require +P?

It shoots standard .45 ACP, .45 ACP +P, and .45 ACP +P+ without issues. The compensated slide is designed to handle higher-pressure loads, but standard pressure ammo cycles reliably for range use.

What holsters fit the FN 545 MRD Comp with a red dot?

Most full-size FN 545 holsters will work, but you need a model cut for optics. Brands like Safariland, Blackhawk, and Bravo Concealment offer specific FN 545 holsters with optic cuts. Check the holster’s compatibility list before ordering.

Trust & Shipping

• ✔ Nationwide delivery (all 50 states) – we ship to your FFL dealer
• ✔ Ships 1-2 business days from order confirmation
• ✔ 30-day returns – unused, unmodified firearms only
• ✔ Secure checkout – encrypted payment processing

Browse more options in our Semi Auto Handguns category, or check out FN Handguns and .45 ACP Pistols for similar models.

Last updated: April 2026