FN 509M Midsize Tactical 9mm FDE

The FN 509M Midsize Tactical is a midsize, duty-capable pistol engineered for range training, duty use, and everyday carry. It is configured to accept red-dot optics and to accommodate suppressors when required, while maintaining controllable handling in a midsize footprint.

The pistol combines a flat dark earth polymer frame with an optics-cut stainless slide and enhanced ergonomics for positive purchase and follow-up shots. The slide features serrations and an optics footprint; the barrel is steel and threaded with a 1/2x28 pattern for NFA-compatible accessories, and the controls are configured for ambidextrous operation.

Key Specifications

• The caliber is 9mm.
• The action type is Semi-Auto.
• The barrel length is 4.5 inches.
• The frame material is Polymer.
• The frame finish and color are Flat Dark Earth.
• The weight is 26.5 ounces.
• The optic footprint is Multiple, supporting common MRD footprints.
• The sights are Suppressor-height 3-dot night sights.
• The NFA thread pattern is 1/2x28.
• The pistol ships with two magazines and an FN soft case.

State Restrictions: This firearm is not available for sale in California, Rhode Island, Washington, Illinois, and Oregon.

For those seeking a versatile midsize pistol, the FN America / FN Herstal FN509M 9mm delivers optics-ready performance with a threaded barrel and controls suited for both right-hand shooters and tactical applications. Buy the FN America / FN Herstal FN509M 9mm online today.

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