FN 545 MRD 45 ACP | 4.1in 15+1 | FN 66101387

The FN 545 MRD is a full-size .45 ACP striker-fired pistol built for controllable handling and optics-ready versatility. It features a 4.1-inch hammer-forged, target-crowned barrel and a slide cut to accept MRD footprints using the supplied mounting plates. For a rugged pistol red dot under $1,000 that pairs well with this platform, consider the Trijicon RMR Type 2, which co-witnesses cleanly with the MRD mounting options.

Product Specifications

• The caliber is .45 ACP.
• The action is Semi-Auto.
• The barrel measures 4.1 inches and is target crowned for durability.
• The magazine capacity is 10 or 15 rounds (configuration dependent).
• The firearm ships with two magazines included.
• The frame is constructed from polymer for a balanced feel.
• The slide is finished in black PVD with optic cut and serrations.
• The optic footprint supports multiple MRD mounting plates included with the pistol.
• The unloaded weight is approximately 30 ounces.
• The overall length is 7.7 inches.
• The iron sights are driftable steel sights that co-witness with MRD optics.
• The barrel is hammer-forged and finished with a target crown.
• The frame includes a MIL-STD-1913 Picatinny rail for accessories.
• The package ships with two interchangeable backstraps, four MRD mounting plates, a locking case and owner’s manual.
• The UPC is 845737015701.

The FN 545 MRD blends a full-size .45 ACP platform with an optics-forward design and practical ergonomics for sustained range use and competitive or duty-style applications. Its interchangeable backstraps and low-profile mounting system make it adaptable to a range of shooter preferences while maintaining a predictable, tuned trigger feel. The included accessories and MRD plates make mounting a red dot straightforward and user-friendly.

Owners commonly praise the pistol’s ergonomics and its optics-ready versatility; many note the comfortable grip and the convenience of the MRD mounting system.

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