The FN 509 Midsize pistol in 9mm with a 4-inch barrel and black finish (brand part no. FN 66-100464) combines a four-inch slide and barrel with a midsize frame, retaining full-size pistol performance in a more easily concealed package. FN America ships the pistol standard with 10-round capacity, and it’s compatible with all FN 509 magazines using a sleeve for extended capacity options. Improved texturing on the two included backstraps aids recoil management, and a new flatter-faced trigger allows for a more controllable press and cleaner break. Among midsize semi-auto handguns, this FN 509 Midsize configuration favors shooters who want full-size performance in a more concealable frame.

Key Specifications

• Chambered in 9mm.
• Capacity of 10 rounds.
• The barrel measures 4 inches, on a midsize frame.
• The trigger is flat faced for a more controllable press.
• The pistol is compatible with all FN 509 magazines using a sleeve.
• The grip includes two backstraps with improved texturing for recoil management.
• The action type is Striker Fired.
• The safety is No Manual.
• The sights are Fixed 3-Dot Luminescent.

Frequently Asked Questions

Can this pistol use other FN 509 magazines? Yes, it’s compatible with all FN 509 magazines using a sleeve.

What kind of trigger does this pistol use? A flatter-faced trigger for a more controllable press and cleaner break.

Buy the FN 509 Midsize, 9mm

Full-size performance in a more concealable midsize frame is exactly what this FN 509 Midsize delivers. Order it from our Lubbock, Texas gun shop for fast, insured shipping to your FFL.