The FN 545 MRD pistol in .45 ACP with a black finish and two 10-round magazines (brand part no. 66101389) brings FN’s optics-ready MRD design to the .45 ACP cartridge, giving shooters a striker-fired platform built for duty and defensive use. FN America builds the pistol with a 4.1-inch crowned barrel and a slide cut to mount most major red-dot optics directly. Extra backstraps ship in the box to dial in hand fit, along with a premium zippered case and four MRD mounting plates for different optic footprints. Among optics-ready .45 ACP semi-auto handguns, this 545 MRD configuration favors shooters who want .45-caliber stopping power with direct optic compatibility.

Key Specifications

• The chambering is .45 ACP.
• The capacity is 10-round.
• The pistol ships with two magazines included.
• The barrel measures 4.1 inches, crowned for accuracy.
• The slide is cut to mount most major optics directly.
• The kit includes extra backstraps, a premium zippered case, and four MRD mounting plates.
• The unloaded weight is 30 ounces.
• The sights are Co-Witness Height Sights, supporting accurate target acquisition.
• The action is Semi-Auto.
• The safety is no.
• The barrel has a 1-in-16-inch twist rate.

Frequently Asked Questions

Is this pistol ready for a red dot optic? Yes, the slide is cut to mount most major red-dot optics directly, and four mounting plates are included.

How does this differ from the FN 510 MRD? The 545 MRD chambers .45 ACP instead of 10mm, on the same optics-ready platform.

Buy the FN 545 MRD Pistol, .45 ACP

.45-caliber stopping power with direct optic mounting is exactly what this 545 MRD delivers. Order it from our Lubbock, Texas gun shop for fast, insured shipping to your FFL.