FN 509 Compact (9mm) MRD Semi-Auto Pistol - FDE

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Optics sold separately


With FN’s patented Low-Profile Optics Mounting System and unparalleled modularity of the FN 509 platform, the FN 509 Compact MRD joins the ranks packing a full-size punch in a compact, optics-ready package. The pistol is 9mm and striker-fired with 3.7-inch barrel, standard 12+1 capacity and the capability to accept all higher capacity FN 509 magazines. The patented FN Low-Profile Optics Mounting System accepts nearly all commercially available miniature red dot optics and features blackout iron sights that co-witness. The improved controls aid in manipulation, the new improved texturing on the two included backstraps provides better recoil management, and a new flatter faced trigger allows for more controllable trigger press and cleaner break.

Primary Features:

  • Full-sized performance in a concealed carry package
  • Striker-fired autoloader
  • Double-action operation
  • Fully ambidextrous controls
  • FN Low Profile Optics Mounting System with plate adapters for direct mounting of more than 10 optics
  • All-black co-witness iron sights

Click HERE to purchase the optics


SKU: 845737010911 Categories: , Tag:


Additional Information
Model509 Compact MRD
TypePistol:  Semi-Auto
ActionDouble Action
SafetyNo Manual Safety
FramePolymer (FDE) – Straightened Grip
SightsAll Black Co-Witness Iron Sights
Barrel Length3.7″ (Cold Hammer-Forged Stainless Steel)
Overall Length6.8″
Weight25.5 oz
MagazinesOne 12 Round Magazine & One 15 Round Magazine
Product UPC66-100574

Additional Information Content

Modern Warriors

We started Modern Warriors for the sole purpose of providing a less expensive way to enjoy our love of buying and shooting some really cool stuff. What started as a hobby has turned into a business where we have developed the experience and ability to help you enjoy our same hobby and save you money in the process.

We specialize in tactical weapons, including suppressors, short barrel rifles and full auto weapons. We have routine experience in shooting the weapons we carry, so if you want our opinion on how a weapon operates, we will gladly provide it. We also have expertise working with licensed professionals in setting up gun trusts, which is an ideal way of purchasing, owning and operating any weapon restricted by the National Firearm Act. Don’t let the word “trust” scare you. It is very easy to set one up if you have the right help.

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