The FN 509 Mid-Size pistol in 9mm with tritium night sights (brand part no. 66-101104) is built with duty-oriented upgrades, including a conical striker that reduces trigger pull by nearly a pound and a flat-faced trigger that breaks cleanly. FN America pairs the 4.5-inch barrel with front and rear cocking serrations for clean slide manipulation even in severe weather, and three-dot tritium night sights offer a sighting configuration built for accurate, rapid target acquisition. The pistol ships with two 15-round magazines and weighs 26.5 ounces unloaded. Among duty-oriented semi-auto handguns, this 509 Mid-Size configuration favors shooters who want a versatile, low-light-ready platform.

Key Specifications

• The chambering is 9mm, with two 15-round magazines included.
• The barrel measures 4.5 inches, and overall length is 7.4 inches.
• The sights are three-dot tritium night sights for low-light aiming.
• The trigger is a flat-faced, conical striker design with a lighter pull.
• The slide features front and rear cocking serrations for clean manipulation.
• The unloaded weight is 26.5 ounces.

Frequently Asked Questions

Does this pistol include night sights? Yes, three-dot tritium night sights ship standard.

How many magazines are included? Two 15-round magazines.

Buy the FN 509 Mid-Size Pistol, 9mm

A duty-oriented 9mm with a lighter, conical-striker trigger pull is exactly what this FN 509 Mid-Size delivers. Order it from our Lubbock, Texas gun shop for fast, insured shipping to your FFL.