The FN 545 Tactical pistol in .45 ACP with an FDE finish and threaded barrel (brand part no. 66101386) sets a new standard for .45 ACP capacity, built on the proven ergonomics of the FN 509 Tactical. FN America machines the 4.71-inch cold-hammer-forged barrel with a target crown and threads it .578×28 to mount compensators and suppressors, while tritium steel dovetail night sights co-witness with most mounted red dot optics. A low-profile optics mounting system accepts a red dot with no gunsmithing required, and the double-action striker-fired trigger breaks clean at approximately 6 pounds. Depending on included magazines the pistol reaches up to 18+1 rounds, and two interchangeable backstraps, four MRD mounting plates, and a premium zippered case ship in the box. Among high-capacity semi-auto handguns, this 545 Tactical configuration favors shooters who want maximum .45 ACP capacity with optic and suppressor compatibility.

Key Specifications

• The chambering is .45 ACP, with capacity reaching up to 18+1 rounds depending on magazine.
• The barrel measures 4.71 inches, cold-hammer-forged and threaded for suppressor use.
• The sights are tritium steel dovetail night sights, co-witnessing with most mounted optics.
• The slide accepts a red dot optic via a low-profile mounting system, no gunsmithing required.
• The trigger is double-action striker-fired, breaking at approximately 6 pounds.
• The kit includes two interchangeable backstraps and four MRD mounting plates.
• The unloaded weight is 31 ounces.
• The barrel thread pattern is .578″x28.
• The barrel twist rate is 1-in-16-inch.
• The safety is Ambidextrous Slide.

Frequently Asked Questions

Does this pistol accept a suppressor? Yes, the 4.71-inch barrel is threaded .578×28 for compensators and suppressors.

What is the maximum capacity? Up to 18+1 rounds of .45 ACP depending on which included magazine is used.

Buy the FN 545 Tactical Pistol, .45 ACP

Industry-leading .45 ACP capacity with full optic and suppressor compatibility is exactly what this 545 Tactical delivers. Order it from our Lubbock, Texas gun shop for fast, insured shipping to your FFL.