FN 545 Tactical 4.71in .45 ACP Threaded Optic-Cut
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- 30-day returns on unused parts and accessories
About this product
The FN 545 Tactical 4.71in .45 ACP Threaded Optic-Cut is a full-size, duty-grade pistol built for the shooter who demands reliability, accuracy, and suppressor compatibility right out of the box. Chambered in the venerable .45 ACP, this handgun pairs a suppressor-ready threaded barrel with a slide cut for MRD optics, delivering a ready-to-run platform for competition, hunting, or home defense.
| Manufacturer | FN America (per manufacturer specs) |
|---|---|
| Model | 545 Tactical |
| Material | Steel slide, polymer frame |
| Compatibility | MRD optics (RMR footprint), .45 ACP ammunition, suppressor with 5/8x24 threads |
| Finish | Black nitride slide, black polymer frame |
| Weight | 33.6 oz (unloaded, per manufacturer specs) |
| Condition | New |
Key Features
- Suppressor-Ready Threaded Barrel: The 4.71-inch barrel is target-crowned and threaded 5/8x24, so you can mount a suppressor or compensator without aftermarket work — essential for quiet hunting or tactical use.
- Optic-Cut Steel Slide: The slide is precision-machined for MRD optics (RMR pattern), and ships with suppressor-height night sights for a perfect co-witness — no milling or adapter plates needed.
- Ambidextrous Controls: Slide stop, magazine release, and thumb safety are all fully ambidextrous, making this pistol a natural fit for left-handed shooters or those who train with both hands.
- Interchangeable Backstraps: Three included backstraps let you dial in the grip angle and palm swell, so the 545 Tactical fits your hand like a custom glove — critical for fast, accurate follow-up shots on a dove or a steel plate.
- MIL-STD-1913 Picatinny Rail: Mount a light or laser without adapters, ensuring you’re ready for low-light conditions or home defense scenarios.
Who It's For
This pistol is for the experienced .45 ACP shooter who wants a factory-ready tactical handgun without sending it off to a gunsmith. It suits bird hunters who carry a sidearm for backup, competitive shooters in CDP or Limited divisions, and anyone who appreciates the thump of a .45 with the precision of a red dot.
Pros & Cons
- Pro: Factory optic cut and threaded barrel save you $200+ in aftermarket work.
- Pro: Night sights are suppressor-height, so you can co-witness with any RMR-pattern dot.
- Pro: Ambidextrous controls make it a true ambi gun, not a lefty afterthought.
- Con: The 33.6-ounce weight is on the heavy side for concealed carry — better suited for duty, range, or hunting use.
Comparison
| Feature | FN 545 Tactical | Zev Technologies OZ9 | Agency Arms AOS G17 |
|---|---|---|---|
| Caliber | .45 ACP | 9mm | 9mm |
| Barrel Length | 4.71 in (threaded) | 4.49 in (threaded) | 4.49 in (threaded) |
| Optic Cut | Factory MRD (RMR) | Factory MRD (RMR) | Aftermarket only |
| Capacity | 15+1 | 17+1 | 17+1 |
| Price | $1,014.33 | $1,499.00 | $1,899.00 |
FAQ
What optics fit the FN 545 Tactical slide?
The slide is cut for the RMR footprint, so it accepts Trijicon RMR, Holosun 507C/508T, and similar patterns. You may need a sealing plate for some models.
Can I shoot .45 ACP +P ammo in this pistol?
Yes, the FN 545 Tactical is rated for +P ammunition per manufacturer specs, but extended use of +P+ may accelerate wear.
Does the threaded barrel come with a thread protector?
Yes, a steel thread protector is included from the factory.
Is this pistol California-compliant?
The FN 545 Tactical is not on the California roster as of April 2026. Check local laws for restrictions.
Trust & Delivery
- ✔ Nationwide delivery (all 50 states)
- ✔ Ships 1-2 business days
- ✔ 30-day returns
- ✔ Secure checkout
Last updated: April 2026
According to FN America specs, over 80% of law enforcement agencies using FN sidearms report zero malfunctions during qualification courses — a statistic that speaks to the reliability of this platform.
Browse more Semi Auto Handguns or check our Tactical Pistols and .45 ACP Pistols.