Buy FN 509 Fullsize MRD Pistol Online

The FN 509® Fullsize MRD is a remarkable addition to the FN 509® Series, catering to users who seek a full-sized duty-style pistol for personal defense or home security. This striker-fired handgun combines precision, reliability, and adaptability, making it an exceptional choice for discerning shooters.

Key Features:

  1. Low-Profile Optics Mounting System (MRD): The 509 Fullsize MRD features FN’s patented MRD system, allowing seamless attachment of most commercially available miniature red dot optics. Whether you prefer a Trijicon RMR, Holosun, or another popular sight, the 509 Fullsize MRD accommodates them all. The co-witness front and rear sights ensure reliable backup aiming.
  2. Threaded Barrel: The 4.5-inch cold hammer-forged barrel, cut from FN’s proprietary machine gun-grade stainless steel, features the signature recessed target crown. This protects rifling integrity, ensuring accuracy and performance throughout the pistol’s lifespan.
  3. Full-Sized Slide and Frame: The 509 Fullsize MRD offers a secure grip and reduced recoil due to the added weight and length of the slide. The frame accommodates various hand sizes, enhancing usability.


  • Caliber: 9mm
  • Operation: Double-action, striker-fired
  • Magazine Capacity: Available in 10 or 12/15 rounds
  • Weight: 27 oz.
  • Barrel Length: 4.5″
  • Overall Length: 7.9″
  • Twist Rate: 1:10″ RH
  • Height: 5.56″
  • Width: 1.35″
  • Trigger Pull: Adjustable from 4.5 to 6.7 lbs.
  • Sight Radius: 6.3″

Construction Details:

  • Slide: Constructed from polymer and featuring replaceable steel frame rails, the slide houses a cold hammer-forged stainless-steel barrel. The polished chamber and feed ramp enhance reliability.
  • Frame: Ambidextrous controls facilitate manipulation, while the grip texture ensures a secure hold.

The FN 509 Fullsize MRD combines innovation, precision, and practicality, making it an exceptional choice for those who demand excellence in their firearm. Elevate your shooting experience with FN’s cutting-edge design! 

!FN 509 Fullsize MRD



FN America

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FN America, a subsidiary of the renowned FN Herstal, stands as a beacon of excellence in the world of firearms. With a storied history and an unwavering commitment to quality, FN America has earned its place as a global leader in the industry. FN is a global leader in the development and manufacturing of high-quality, reliable firearms for military, law enforcement, and commercial customers worldwide. FN offers some of the best semi-automatic rifles and pistols on the market, as well as individual firearm parts, accessories, and apparel. Dury Guns Shop carries several top FN products, including the Five-Seven, PS90, FN15, SCAR, and more. FN is passionately committed to providing dependable, innovative firearms of the highest quality to our customers who rely upon us to enhance their performance and safeguard their lives.

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