FN 509C MRD COMP 9MM 4.2 10RD FDE

Built on FN’s proven FNS Compact platform, the FN 509 Compact MRD is engineered to exceed expectations. Designed for the modern, legally armed citizen, this pistol blends everyday carry practicality with competition-grade performance.

Its compact, low-profile frame makes it easy to carry, while still delivering the accuracy, reliability, and shootability you’d expect from a full-size duty pistol. The FN Low-Profile Optics Mounting System is compatible with most popular micro red dot optics, and the suppressor-height iron sights are perfectly set up for a true co-witness, giving you confidence whether running glass or irons.

What really sets this model apart is the included compensator. Instead of a threaded barrel, FN uses proprietary non-threaded mounting lugs designed specifically for the quick-detach FN compensator. The result? Up to 25% reduction in muzzle rise, faster follow-up shots, and better control — without the hassle of threads.

Like all 509 pistols, this Compact MRD features fully ambidextrous controls, enhanced front and rear slide serrations, a loaded chamber indicator, and no manual safety to slow you down. The rugged polymer frame is built for harsh conditions, while interchangeable backstraps ensure a secure, comfortable grip for any shooter.

The FN 509 Compact MRD represents the next generation of FN handguns — for shooters who refuse to settle for second best when it comes to self-defense.

Specifications

• Manufacturer: FN
• Model: FN 509 Compact MRD
• Action: Semi-Automatic, Striker-Fired
• Caliber: 9mm Luger
• Magazine Capacity: 10 Rounds
• Barrel Length: 4.02" Cold Hammer Forged
• Barrel Features: Recessed Target Crown, Polished Chamber & Feed Ramp
• Compensator: Auto-Indexing Quick-Detach FN Compensator
• Mounting System: Proprietary Non-Threaded Compensator Mounting Lugs
• Trigger Pull: Approx. 5.5 – 7.5 lbs
• Optics Ready: FN Low-Profile Optics Mounting System
• Sights: Black Co-Witness Iron Sights
• Controls: Fully Ambidextrous Slide Stop & Magazine Release
• Safety: No Manual Safety
• Frame: Compact Polymer Frame
• Grip: Two Interchangeable Backstraps
• Accessory Rail: 1913 Picatinny Rail
• Loaded Chamber Indicator: Yes
• Overall Length: 7.4"
• Weight: 25.5 oz
• Finish: Flat Dark Earth (FDE)