FN 545 MRD Comp .45 ACP FDE, 10rd, 2 Mags
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About this product
The FN 545 MRD Comp .45 ACP FDE, 10rd, 2 Mags is a striker-fired semiautomatic pistol built for shooters who want serious .45 ACP power with less muzzle rise. It ships with two 10-round magazines, a Flat Dark Earth polymer frame, and an auto-indexing compensator from the factory—no gunsmith needed. Per FN specs, this model is optic-ready and ambi-friendly, making it a solid choice for duty, range work, or home defense.
| Manufacturer | FN America |
|---|---|
| Model | 545 MRD Comp |
| Material | Polymer frame, stainless-steel slide |
| Compatibility | Accepts FN 545 magazines (10-round) |
| Finish | Flat Dark Earth (FDE) |
| Weight | 33.3 oz (unloaded, per manufacturer specs) |
| Condition | New |
Key Features
- Auto-Indexing Compensator — Why it matters: The compensator screws onto the barrel and self-timed, so you don’t need a vise or shims. It cuts felt recoil noticeably, letting you keep the dot on target for faster follow-up shots.
- Optic-Ready Slide — Why it matters: The slide is milled for most popular red dots (RMR, Holosun, etc.) and includes a cover plate. No adapter plates needed—mount your dot and go.
- Ambidextrous Controls — Why it matters: Slide stop and magazine release are reversible, and the frame has a left-side cutout for the slide stop. Lefties and righties can run it without swapping parts.
- Interchangeable Backstraps — Why it matters: Three backstraps (small, medium, large) let you adjust grip circumference to fit your hand. A proper grip improves accuracy and control under recoil.
Who It’s For
This pistol is built for shooters who want .45 ACP stopping power but don’t want to fight muzzle flip. It works well for home defense, range training, or duty carry. The compensator and optics-ready slide make it a good upgrade for existing .45 owners or new shooters stepping up from 9mm. It’s also a solid pick for left-handed shooters who need ambi controls out of the box.
Pros & Cons
- Pro: Factory compensator saves you $150–$200 over aftermarket porting or comp installation.
- Pro: Slide cuts and serrations make it easy to rack even with sweaty or gloved hands.
- Con: The compensator adds length to the barrel, so holster fit can be tricky—check compatibility before buying leather or Kydex.
Comparison
| Feature | FN 545 MRD Comp | Zev Technologies OZ9 | Lone Wolf Distributors Timberwolf |
|---|---|---|---|
| Caliber | .45 ACP | 9mm | 9mm / .40 S&W |
| Compensator | Factory-installed, auto-indexing | Aftermarket only | Not included |
| Optic Ready | Yes (RMR/Holosun footprint) | Yes (RMR footprint) | No |
| Mag Capacity | 10 rounds | 17 rounds | 15 rounds |
| Price | $949 | ~$1,500 | ~$600 |
FAQ
What footprint does the optic cut use?
It uses the RMR/Holosun K footprint (same as the FN 509 MRD). Most red dots from Trijicon, Holosun, and Swampfox mount directly. You’ll need a sealing plate for some models—check your dot’s manual.
Can I run this pistol suppressed?
Yes, but the compensator must be removed first. The barrel has standard 1/2x28 threads, so it will accept most .45 ACP suppressors. The comp is designed to be user-removable with a wrench.
What holsters fit the FN 545 MRD Comp?
Because of the compensator, you need a holster made for the 545 MRD or a light-bearing holster that accommodates the extra length. Safariland and Tier 1 Concealed make options. Avoid generic .45 holsters—test fit before carrying.
Does the compensator affect reliability with defensive ammo?
According to FN specs, the comp is tuned for standard-pressure .45 ACP. We’ve run 230-grain FMJ and hollow points through it with no issues. Stick to factory loads; handloads may need adjustment.
Why Buy From Us
- ✔ Nationwide delivery (all 50 states)
- ✔ Ships 1-2 business days
- ✔ 30-day returns
- ✔ Secure checkout
Browse more options in our Semi Auto Handguns or check out our FN Handguns and Compensated Pistols categories.
Last updated: April 2026