FN 66101384 545 Tactical 45 ACP | 4.71″ Threaded Barrel

The FN 545 Tactical is a full-size, optic-ready .45 ACP pistol with a 4.71″ threaded, target-crowned barrel and a Flat Dark Earth PVD finish on frame and slide. It ships with two magazines and an MRD mounting system for quick red-dot installation. The pistol offers an 18-round capacity option and a low-profile slide cut with tritium night sights for co-witnessing with compatible optics.

For a sight that pairs well without exceeding $1,000, consider the Holosun 507C; it provides a compact footprint and fast target acquisition while remaining within the FN 545’s MRD-compatible mounting options. Typical applications for this pistol include range training and competition or duty-style carry for agencies or professional users who require a larger-caliber platform.

Product Specifications

• The UPC is 845737015688.
• The manufacturer is listed as FN America / FN Herstal.
• The model is FN 545T.
• The caliber is .45 ACP.
• The capacity is listed as 18 rounds for the extended magazine option.
• The barrel length is 4.7100 inches.
• The thread pattern is .578×28.
• The action is Semi-Auto.
• The frame material is Polymer.
• The frame finish/color is Flat Dark Earth.
• The weight is 31 oz.
• The overall length is 8.30″.
• The optic footprint is listed as Multiple to accept a range of MRD patterns.
• The sights type is Night Sights (tritium-equipped dovetail sights co-witnessing with MRD optics).
• The package includes 2 magazines.

The FN 545 Tactical combines a full-size .45 ACP platform with modern ergonomics and an optics-ready slide. Its threaded, target-crowned barrel and MRD cut make it a practical option for shooters who want a large-caliber duty or competition-capable pistol with the flexibility to add a red-dot. The flat dark earth finish and interchangeable backstraps allow a user to match appearance and fit while the included magazine set gives immediate capacity options out of the box.

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