--- title: "FN America 509M MRD 9mm FDE Optic-Ready Pistol" description: "Midsize 9mm pistol with a 4\" barrel, 10+1 capacity, low-profile optics mounting system, co-witness iron sights, and Flat Dark Earth finish." canonical_url: "https://www.kygunco.com/product/fnh-usa-66-100742-509m-9mm-mrd-4-101-fde" meta: author: KYGUNCO "og:description": "Midsize 9mm pistol with a 4\" barrel, 10+1 capacity, low-profile optics mounting system, co-witness iron sights, and Flat Dark Earth finish." "og:image": "https://cdn.kygunco.com/assets/products/156315/thumbnail.jpg?v=1713453950" "og:image:height": "500" "og:image:width": "500" "og:title": "FN America 509M MRD 9mm FDE 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-66-100742 ![Main product image](https://static.kygunco.com/cdn-cgi/image/f=auto,w=600/assets/products/156315/main.jpg?v=1713453950) For illustration purposes only, this image may not be an exact representation of the product. # FN AMERICA 509M MRD 9mm 4" 10rd Optic Ready Pistol - FDE The FN 509M MRD is a midsize 9mm pistol with a 4" barrel, Flat Dark Earth finish, fully ambidextrous controls, and a low-profile optics mounting system compatible with more than 10 miniature red dot optics. It includes co-witness iron sights, a flatter-faced trigger, interchangeable backstraps, two 10rd magazines, and a locking device. 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. Almost gone. Order now before it sells out. Item # 156315 Style FNM-66-100742 UPC 845737011574 Condition New Manufacturer [FN America](https://www.kygunco.com/brand/fn-america) Model FN 509M Hand Right Hand Finish FDE Round Capacity 10 Caliber 9mm Action Double Action Only Barrel Length 4 in The FN 509M MRD brings you the FN Low Profile Optics Mounting System, giving you the option of direct mounting more than 10 different miniature red dot optics to your concealed carry pistol. Featuring a midsized frame, fully ambidextrous controls, all-black co-witness iron sights, standard 10rd 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. Includes- two interchangeable backstraps, two 10rd magazines and a locking device. - Action: DAO - Caliber: 9mm Luger - Barrel Length: 4" - Capacity: 10+1 - Safety: No Manual - Grips: Texture Flat Dark Earth Interchangeable Backstrap - Sight Configuration: Co-Witness Iron - Frame Finish: Flat Dark Earth - Slide Description: Flat Dark Earth Steel ** 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-66-100742-509m-9mm-mrd-4-101-fde#webpage","@type":"WebPage","description":"Midsize 9mm pistol with a 4\" barrel, 10+1 capacity, low-profile optics mounting system, co-witness iron sights, and Flat Dark Earth finish.","name":"FN America 509M MRD 9mm FDE Optic-Ready 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