FN 509 Midsize Compact 9mm Semi Automatic Pistol

The FN 509 Midsize is a compact 9mm semi-automatic pistol designed for range training, everyday carry, and general handgun use. It features a 10+1-round capacity, 4-inch steel barrel with a recessed target crown, and a shortened midsize grip frame that balances handling, capacity, and concealability.

The matte black stainless steel slide includes front and rear serrations for a defined gripping surface, while the black polymer frame provides an integrated Picatinny accessory rail and interchangeable backstraps. Ambidextrous operating controls support right- or left-handed use, and the textured grip helps maintain a secure hold during operation.

Specifications

• Brand: FN
• Model: 509 Midsize
• Product Type: Semi-Automatic Pistol
• Caliber: 9mm Luger
• Capacity: 10+1 Rounds
• Barrel Length: 4 Inches
• Barrel: Black Steel with Recessed Target Crown
• Slide: Matte Black Serrated Stainless Steel
• Frame: Black Polymer
• Accessory Rail: Picatinny
• Grip: Textured with Interchangeable Backstraps
• Controls: Ambidextrous
• Color: Matte Black
• Manufacturer Part Number: 66100464
• UPC: 845737010027
• Sports South Item Number: 107904

Features

• Four-inch steel barrel with recessed target crown
• Matte black stainless steel slide with front and rear serrations
• Compact polymer frame with integrated Picatinny accessory rail
• Textured grip with interchangeable backstraps
• Ambidextrous operating controls
• Ten-round magazine capacity for restricted-capacity configurations

Benefits

• Midsize frame provides a balance between concealability and comfortable handling
• Interchangeable backstraps allow the grip fit to be adjusted for different hand sizes
• Ambidextrous controls accommodate both right- and left-handed shooters
• Picatinny rail supports compatible lights and handgun accessories
• Slide serrations provide defined gripping surfaces for slide manipulation