FN 20100377 50910rd Extended Floorplate 9mm Luger FN 509 Compact Black Steel

The FN 509 Compact 9mm Luger extended floorplate is a factory replacement magazine component that adds capacity and handling to your compact carry or duty pistol. Built by FN America to OEM specifications, this black steel floorplate maintains the tight tolerances and reliability FN shooters expect. Whether you're running the 509 Compact for concealed carry, home defense, or range work, having quality spare mags and components on hand means you're always ready to get back in the fight.

Extended floorplates serve dual purposes: they bump your round count per magazine and provide a more secure, ergonomic grip purchase when reloading or conducting administrative functions. This particular piece is manufactured to work seamlessly with FN 509 Compact magazines, ensuring a fit that's tight enough to trust and smooth enough to function reliably shot after shot. Black steel construction resists corrosion while maintaining a professional, uniform appearance across your magazine lineup.

FN America builds their accessories to the same standards as their firearms—no shortcuts, no surprises. If you're serious about your 509 Compact platform and want OEM-quality components for backup or upgrade, this extended floorplate is a solid choice that won't let you down.

Key Features

• OEM FN America manufacture ensures proper fit and reliability
• Black steel construction for durability and corrosion resistance
• Extended design improves magazine handling and reload grip
• Compatible with FN 509 Compact platform

Specifications

Frequently Asked Questions

Is this floorplate compatible with all FN 509 Compact magazines?

This extended floorplate is designed for FN 509 Compact magazines and is manufactured to FN specifications for proper fit and function on that platform.

What's the benefit of an extended floorplate over the standard version?

Extended floorplates provide better grip leverage during magazine reloads and handling, and they're typically paired with increased-capacity magazine designs. They give you more surface area to grip when seating a full magazine into your pistol.

Does this come as part of a magazine or is it just the floorplate component?

This is the floorplate component itself. You'll need compatible FN 509 Compact magazines to pair it with, or it may be used as a replacement if your existing floorplate is worn or damaged.