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FN 509 Midsize MRD 9mm Luger 4in FDE Pistol - 15+1 Rounds

by FN
ID 1696595
MPN 66-100741


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It is the customer's responsibility to follow all Federal, State, and Local Laws.
All firearms MUST be picked up by the BUYER (ACTUAL PURCHASER) at your selected Sportsman's Warehouse store or chosen Independent Firearm Dealer (“FFL”).
A valid U.S. and/or state government-issued identification document, or combination of government-issued documents, which reflect the buyer's current residential address, must be presented at the selected store location prior to the completion of any firearm-related paperwork and background check initiation.
The actual purchaser must be 18 years of age or older to purchase rifles and/or shotguns.
The actual purchaser must be 21 years of age or older to purchase handguns and/or firearm receivers, frames, silencers, or pistol-grip only firearms.
Certain states have stricter laws regarding a firearm buyer’s age and Sportsman's Warehouse complies with such requirements.

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FN 509 Midsize MRD 9mm Luger 4in FDE Pistol - 15+1 Rounds


FN 509 Midsize MRD 9mm Luger 4in FDE Pistol - 15+1 Rounds
by FN


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FN 509 Midsize MRD 9mm Luger 4in FDE Pistol - 15+1 Rounds - This evolution of the FN 509 Midsize, now featuring the FN Low Profile Optics Mounting System, gives you the option of direct mounting more than 10 different miniature red dot optics to your concealed carry pistol. The FN 509 Midsize MRD features a four-inch barrel and slide with optics mounting package, a midsized frame, standard 15-round capacity and is compatible with larger capacity FN 509 magazines with use of a sleeve. 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.


  • Twist Rate: 1:10in
  • Striker-Fired Auto Loader
  • Fully Ambidextrous
  • Easily Racked
  • External Extractor
  • Cold Hammer-Forged Stainless Steel
  • MIL-STD 1913 Accessory Mounting Rail
  • Improved Flatter Face Trigger
  • Ships With:
    • Two Interchangeable Backstraps
    • Two 15 Round Magazines
    • Owners Manual
    • Locking Device
    • FN Logo Soft Case


Action Pistol
Capacity 15+1
Barrel Length 4in
Grips Interchangeable Backstrap
Sights Iron
Weight 1.65lbs
Cartridge 9mm Luger
Color Flat Dark Earth
Hand Right
Overall Length 7.4in
State Compliance Colorado Compliant
Threaded Yes
Type Centerfire
Made in the USA Yes


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