--- title: "FN America FDE 509M MRD 9mm Optic-Ready Pistol" description: "FN 509 Midsize MRD 9mm pistol with a 4\" barrel, 15rd capacity, ambidextrous controls, and a Low Profile Optics Mounting System." canonical_url: "https://www.kygunco.com/product/fnh-usa-66-100741-509m-9mm-mrd-4-151-fde" meta: author: KYGUNCO "og:description": "FN 509 Midsize MRD 9mm pistol with a 4\" barrel, 15rd capacity, ambidextrous controls, and a Low Profile Optics Mounting System." "og:image": "https://cdn.kygunco.com/assets/products/156314/thumbnail.jpg?v=1712593146" "og:image:height": "500" "og:image:width": "500" "og:title": "FN America FDE 509M MRD 9mm Optic-Ready Pistol" --- > Index of every page on this site: [llms.txt](https://www.kygunco.com/llms.txt) [Home](https://www.kygunco.com/) / [Shooting](https://www.kygunco.com/category/shooting) / [Guns](https://www.kygunco.com/category/shooting/guns) / [Handguns](https://www.kygunco.com/category/shooting/guns/handguns) / [Semi-Auto](https://www.kygunco.com/category/shooting/guns/handguns/semi-auto) / FNM-66-100741 ![Main product image](https://static.kygunco.com/cdn-cgi/image/f=auto,w=600/assets/products/156314/main.jpg?v=1712593146) For illustration purposes only, this image may not be an exact representation of the product. # FN AMERICA 509M MRD 9mm 4" 15rd Optic Ready Pistol - FDE The FN 509 Midsize MRD is a striker-fired 9mm pistol with a 4-inch cold hammer-forged stainless steel barrel, midsized polymer frame, and 15-round capacity. Its FN Low Profile Optics Mounting System supports direct mounting of more than 10 miniature red dot optics, while ambidextrous controls, interchangeable backstraps, and a flatter-faced trigger enhance handling. See Price In Cart ** 5 interest-free payments of **$131.31** with ![Sezzle logo](https://www.kygunco.com/brands/sezzle.svg) ** ![Credova logo](https://www.kygunco.com/brands/credova.svg) As low as **$117.21**/month with ![Credova text logo](https://www.kygunco.com/brands/credova-text.svg) ** Online In Store ** Free Shipping Enjoy delivery to the Lower 48 States at no cost. ** Ships To FFL Dealer Fulfilled by a partner warehouse. ** Partner Fulfilled ** Check Local Restrictions Not sure whether this item can be shipped to your area? Enter your ZIP code for a quick check. Item # 156314 Style FNM-66-100741 UPC 845737011567 Condition New Manufacturer [FN America](https://www.kygunco.com/brand/fn-america) Model FN 509M Hand Right Hand Finish FDE Round Capacity 15 Caliber 9mm Action Double Action Only Barrel Length 4 in 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. - 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 SLIDE - Easily racked, combat-style sights - External extractor; loaded chamber indicator - Improved front and rear cocking serrations BARREL - Cold hammer-forged stainless steel - Recessed target crown - Polished chamber and feed ramp FRAME - Polymer construction with replaceable steel frame/slide rails - Enhanced grip textures which enables faster follow-up shots in all conditions - Interchangeable backstraps - MIL-STD-1913 accessory mounting rail - Improved flatter face trigger OPERATING CONTROLS - Fully ambidextrous slide stop lever and magazine release MAGAZINE - High visibility, low-friction follower; polymer base with black finish - Compatible with FN 509 17-round and 24-round magazines with appropriate magazine sleeves SHIPS WITH - Two interchangeable backstraps - Two 15-round magazines or Two 10-round - Owner's manual - Locking device - FN logo soft pistol case - Twist Rate: 1:10" RH - Height: 5.2" - Width: 1.35" - Trigger Pull: 5.5 - 7.7 lb. - Sight Radius: 5.79" ** WARNING: This product contains chemicals known to the State of California to cause cancer, birth defects, or other reproductive harm. For more information, go to [www.p65warnings.ca.gov](https://www.p65warnings.ca.gov). ## Frequently Bought Together 0.0 ** ** ** ** ** 0 reviews ** ** ** ** ** 0 ** ** ** ** ** 0 ** ** ** ** ** 0 ** ** ** ** ** 0 ** ** ** ** ** 0 ## Don't Forget Your Ammo ```json {"@context":"https://schema.org","@graph":[{"@id":"https://www.kygunco.com/#website","@type":"WebSite","description":"Shop KYGUNCO for firearms, ammo, accessories, parts, and outdoor gear at low prices with fast, easy nationwide shipping.","name":"KYGUNCO","url":"https://www.kygunco.com/","publisher":{"@id":"https://www.kygunco.com/#/schema/organization/kygunco"}},{"@id":"https://www.kygunco.com/product/fnh-usa-66-100741-509m-9mm-mrd-4-151-fde#webpage","@type":"WebPage","description":"FN 509 Midsize MRD 9mm pistol with a 4\" barrel, 15rd capacity, ambidextrous controls, and a Low Profile Optics Mounting System.","name":"FN America FDE 509M MRD 9mm Optic-Ready 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