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The .45 ACP has been around for well over a century, and FN's take on it with the 545 Tactical is about as current as it gets. Rather than start from scratch, FN built the 545 around the same ergonomic DNA as the FN 509 Tactical, so if you've shot that pistol, the controls and feel will be immediately familiar. The polymer frame rides low on the bore axis to keep muzzle flip in check, and the checkered grip panels with multiple texturing zones give you a solid purchase whether you're shooting gloved or bare-handed. Two interchangeable backstraps let you dial in the fit for your hand size.
The 4.71-inch cold hammer-forged barrel is threaded at .578×28 TPI, which is the standard pitch for most .45 ACP suppressors and compensators. The polished feed ramp and chamber help ensure reliable feeding across a wide variety of loads, including hollow points. The optics-ready slide comes pre-cut to accept micro red dots from several major manufacturers, and the pistol ships with four MRD mounting plates covering popular footprints including Trijicon RMR/SRO, Leupold DeltaPoint Pro, Holosun 507/508, Vortex Venom/Viper/Razor, Docter, C-More STS2, and Burris. FN's self-locking fastener system means no thread locker is needed to keep your optic secure. The co-witness tritium night sights are suppressor height, so they stay fully usable whether you run a red dot or not.
The trigger is precision-tuned with a clean break and a pull weight in the 5.5 to 7.7 lb. range. Field stripping is handled by a frame-mounted disassembly lever that rotates 90 degrees, keeping things simple and consistent. All controls, including the slide stop lever and magazine release, are fully ambidextrous, making this a genuinely left-hand-friendly pistol without any aftermarket work. The full MIL-STD-1913 Picatinny rail up front accommodates most weapon-mounted lights. The high-endurance conical striker and loaded chamber indicator round out a feature set that covers everything you'd expect from a purpose-built tactical pistol. This FDE variant ships with two 10-round magazines.
The FN 545 Tactical ships with four MRD mounting plates that cover a wide range of popular footprints, including the Trijicon RMR/SRO, Leupold DeltaPoint Pro, Holosun 507/508, Vortex Venom/Viper/Razor, Docter, C-More STS2, and Burris FastFire. FN's optics mounting system uses a self-locking fastener design, so thread locker is not required or recommended. The included suppressor-height tritium night sights co-witness with most installed micro red dots, so you always have a backup aiming solution.
Yes, the 4.71-inch cold hammer-forged barrel is threaded at .578×28 TPI, which is the standard thread pitch for .45 ACP suppressors and compensators in the U.S. market. The .45 ACP cartridge is also inherently subsonic at standard velocities, which makes it a natural pairing for suppressed use. The included tritium night sights are suppressor-height so they remain fully usable with a can mounted.
No, the FN 545 Tactical does not have a manual thumb safety. Like most modern striker-fired duty pistols, it relies on internal safeties built into the trigger and fire control system rather than an external lever. This is consistent with how the FN 509 Tactical platform operates, and it is intentional for a pistol designed around fast, consistent use.
The FNX-45 Tactical is a hammer-fired, DA/SA pistol that has been around for over a decade, while the FN 545 Tactical is FN's newer, striker-fired answer for the .45 ACP market. The 545 Tactical benefits from a more modern optics mounting system that supports a broader range of MRD footprints, fully ambidextrous controls, and the ergonomic refinements developed through the FN 509 series. Both are serious pistols, and the right choice comes down to whether you prefer hammer-fired or striker-fired operation.
The FN 545 Tactical magazine well is designed to accept standard FN 545 magazines, which are available in 10-round, 15-round, and 18-round configurations. This 10+1 variant ships with two 10-round magazines. The 15 and 18-round magazines are sold separately and are compatible with this pistol.
The trigger is a precision-tuned, double-action striker-fired design with a clean break and a pull weight that falls in the 5.5 to 7.7 lb. range. The reset is consistent and tactile, which most experienced pistol users find comfortable for both range sessions and practical use. It shares the same general trigger architecture as the well-regarded FN 509 Tactical.
| UPC | 845737015695 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | 66-101386 |
| Action | |
| ATF Type | Pistol |
| Barrel Finish | Black |
| Barrel Length | 4.71" |
| Caliber/Gauge | .45 ACP |
| Capacity | 10 + 1 |
| Color | Flat Dark Earth |
| Length | 12.1500 |
| Model | |
| Number of Magazines | 2 10 rd. |
| Package Height | 3.3 |
| Package Width | 11.2 |
| Product Type | Striker Fired |
| Safety | No |
| Shipping Weight | 4.15 |
| Sights | Dovetail |
| Sights Type | Dovetail |
| Slide Description | Optic Cut/Serrated |
| State Restriction (CA) | NO DIRECT SHIP TO CALIFORNIA |
| State Restriction (IL) | NO SALE TO ILLINOIS PICA |
| Thread Pattern | .578″x28 |
| Units per Box | 1 |
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