Home / Guns / FN America / FN Herstal / FN 509 MRD Flat Dark Earth 9mm 4.5 Barrel 10-Rounds
FN 509 MRD Flat Dark Earth 9mm 4.5 Barrel 10-Rounds

FN 509 MRD Flat Dark Earth 9mm 4.5 Barrel 10-Rounds

Lowest Price
MSRP
$841
Savings
21% off
Verified In Stock at
16 Stores
Updated
Aug 26, 2026
2 Magazines
4.5-in. cold hammer-forged stainless steel
Aggressive slide serrations for positive manipulation
Enhanced grip texture which enables faster follow-up shots in all conditions
External extractor and loaded chamber indicator
FN Low-Profile Optics Mounting System
Fully ambidextrous slide stop lever and magazine release
Includes FN Soft Case, Optics mounting system, two backstraps and (2) 10 Round magazines

Specifications

Caliber
Series
MRD
MPN
66-100723
UPC
845737011840

Description

FN 509 MRD Features The 509 MRD features an optics-cut slide with a proprietary mounting system that accommodates most leading red dot sights. The suppressor-height co-witness iron sights allow seamless transition between red dot and backup sights enhancing accuracy and target acquisition in any lighting condition. The hammer-forged stainless steel barrel is precision-made and finished with a recessed target crown for added accuracy and protection. Its Flat Dark Earth PVD slide finish and matching FDE polymer frame give it a distinctive tactical look while providing excellent corrosion resistance. The full-size frame includes an integrated Picatinny rail for lights or lasers and is paired with interchangeable backstraps for personalized ergonomics. With a trigger pull between 4.5 and 6 pounds ambidextrous controls and a 10+1 capacity the FN 509 MRD is a high-performance choice for both right- and left-handed shooters. FN 509 MRD Specifications Manufacturer: FN Model: 509 MRD Series: MRD Caliber: 9mm Luger Action: DAO (Double Action Only) Type: Semi-Auto Pistol Frame Size: Full Size Frame Finish: Flat Dark Earth Frame Material: Polymer Frame Description: Polymer Frame w/ Picatinny Rail Slide Finish: Flat Dark Earth PVD Slide Description: Optic Cut / Serrated Slide Material: Stainless Steel Barrel Length: 4.50 Barrel Material: Hammer-Forged Stainless Steel Barrel Finish: Black Barrel Description: Recessed Target Crown Twist Rate: 1:10 RH Muzzle: Recessed Crown Sights: Co-Witness Iron Sights Sight Type: Suppressor Height Optics Ready: Yes Capacity: 10 + 1 Max Capacity: 10 Grips: Flat Dark Earth Polymer Trigger Pull Weight: 4.5 - 6 lbs Safety Features: No Manual Safety Overall Length: 7.90 Height: 5.56 Width: 1.35 Weight: 27 oz Hand: Ambidextrous
Stay Connected

Join our newsletter for the latest updates and exclusive deals.

ARMSAGORA

Compare prices on firearms, ammunition, and accessories from hundreds of trusted retailers. Find the best deals, track prices, and build your own loadouts.

© 2026 ARMSAGORA. All rights reserved.
Not an FFL licensed dealer. ARMSAGORA is a product comparison tool.