FN 509 MIDSIZE for Sale

Quick Look at the FN 509 Midsize

The FN 509 Midsize stems from FN America's entry into the U.S. Army's modular handgun trials in the 2010s. It balances compact dimensions with full-size performance, making it ideal for concealment and control. Today, it stands out in the striker-fired market for duty-ready resilience and shootability.

Why It's a Top Choice

• Combat-tested platform with law enforcement adoption
• Excellent ergonomics for mid-sized grip control
• Comes optics-ready out of the box
• Fully ambidextrous controls
• Interchangeable backstraps for custom fit

Key Variants

FN 509 Midsize MRD

Perfect for red-dot users, this model includes FN's optics mounting system standard.

FN 509 Midsize FDE

Flat Dark Earth colorway offers a tactical aesthetic and improved concealment in arid environments.

FN 509 Midsize LE

Law Enforcement variant with night sights and additional duty-driven enhancements.

Competitor Comparison

Best Use Cases

• Concealed carry with full-size controllability
• Law enforcement and duty use
• Home defense readiness
• Range training and practice
• Red dot pistol skills

FAQs

Can I carry the FN 509 Midsize concealed?

Yes. Its shorter slide and compact grip make it suitable for concealed carry with a mid-size feel.

What is the difference between the FN 509 and Midsize?

The Midsize has a shorter slide and grip than the standard FN 509, offering easier concealment.

How does the FN 509 Midsize perform with optics?

The MRD variant supports direct red-dot mounting using FN's plate system, ensuring robust zero retention.