FN 66100816 509C Compact 9mm | 3.7″

The FN 509C is a compact, striker-fired 9mm pistol built for everyday carry and concealed use. It features a 3.7″ barrel, low-profile snag-free sights, an accessory rail, and interchangeable backstraps to tailor the grip. For users who want a red-dot optic, a small footprint optic such as the Trijicon RMR Type 2 pairs well with the slide profile and remains below typical $1000 retail thresholds.

Applications: everyday carry (EDC) and concealed carry or range carry for practice and training.

Product Specifications

• The manufacturer is listed as FN America / FN Herstal.
• The model/series is identified as 509C (Compact).
• The product UPC is 845737012809.
• The caliber is listed as 9mm / 9mm Luger.
• The action is Semi-Auto.
• The barrel length is 3.7 inches.
• The overall length is 6.80 inches.
• The weight is listed as 25.50 oz.
• The sights are described as low-profile, High-Viz front dot.
• The barrel is described as cold hammer-forged with a recessed target crown.
• The slide is described as serrated for improved manipulation.
• The finish style is Matte Black / Colored.
• The pistol is noted as striker fired.
• The package includes two magazines.
• The frame includes an accessory rail listed as MIL-STD-1913 (Picatinny).

The FN 509C balances compact dimensions with features carried over from full-size designs: a 3.7″ hammer-forged barrel, low-profile sights, and ergonomics that support controllable follow-up shots. Its controls and interchangeable backstraps allow users to fine-tune hand fit, and the included accessories make it practical for carry and range use.

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