NRA Gun of the Week: FN 509 Compact MRD FDE

by
posted on June 12, 2020
When the U.S. Army released a Request for Proposal looking for a new firearm to replace Beretta’s M9, a new family of handguns was developed at Fabrique Nationale—the Model 509. Even though FN’s submission was not selected in the XM17 Modular Handgun System trials, the Belgian-based company provided the commercial market with a field-worthy design based off of its previously-successful FNS pistol. The FN 509 immediately gained acceptance with target shooters and home defenders, line extensions of the striker-fired, double-action pistol followed. Moreover, a compact-size variant was unveiled tailored for concealed carry with enhanced features.

Left-side view of a brown FN pistol on white background with text on image.

FN’s 509 Compact Miniature Red Dot (MRD) FDE features the company’s patented Low-Profile Optics Mounting System, a unique setup designed to accommodate the industry’s most-trusted red-dot and reflex optics. Weighing in at 22.7 ozs. empty and measuring 5.2”-tall, 1.35”-wide and 6.75” long, the 509 Compact MRD holds up to 15 rounds of 9 mm Luger; 24-round magazines borrowed from the full-size variant also fit.

Two pistol magazines with brown base plates standing vertical on white background.

A modular polymer frame is provided with the 509 Compact MRD, and our test sample arrived in Flat Dark Earth (FDE). FN provides interchangeable backstraps to accommodate various hand sizes and shooting grips its users require. Additionally, improved patterns of texturing combine to help manage recoil and stability.

Quartering view of a brown FN pistol with optic attached shown on white background.

Users of the FN 509 Compact MRD FDE pistol will find its controls, slide stop and magazine release, to be bilateral for strong- and weak-hand operation. An improved trigger that includes a passive safety mechanism is included—our test sample required a 7-lb., 1-oz. pull to release the sear.

Close-up view of handgun trigger.

Topping the frame is a steel slide fitted with a 3.7”, cold-hammer-forged, stainless steel barrel. FN includes deep- and wide-cut serrations fore and aft for an enhanced experience when manipulating the slide. The tactical sights provided are designed to cowitness with mounted optics, and just forward of the rear sight is the company’s optic-mounting system and provided cover plate.

Close-up view of pistol slide and machining cuts to accommodate optics.

FN ships its 509 Compact MRD FDE in a soft-sided, zipper case that includes a FN Low-Profile Optics-Mounting System™ plate kit, one 12-round magazine with pinky extender and one 15-round magazine with grip sleeve—10-round units are provided for restricted-capacity localities.

To learn more about the FN 509 Compact MRD FDE, watch our NRA Gun of the Week video above.

FN 509 Compact MRD FDE Specifications
Make: FN America
Model: 509 Compact MRD FDE
Action Type: recoil-operated, semi-automatic, center-fire pistol
Chambering: 9 mm Luger
Frame: modular polymer
Barrel: 3.7” cold-hammer-forged, stainless steel
Slide: Low-Profile Optics Mounting System
Sights: dovetailed, raised square-notch rear, post front
Trigger: double-action, 7-lb., 1-oz. pull
Magazine: 10-, 12-, and 15-round detachable box
Length: 6.75”
Height: 5.2”
Width: 1.35”
Weight: 22.7 ozs. empty
MSRP: $799

Further Reading:
Tested: The FN 509 Pistol
Tested: FN's 509 Tactical Pistol
An Inside Look At The FNS Compact Pistol
FN Browning Model 1922 Pistol
FN: The First 125 Years

Extras:










Latest

Beretta Rinascimento
Beretta Rinascimento

Jepson Donates "Set Of Nine" To NRA Museum

Long on display at the NRA National Sporting Arms Museum in Springfield, Mo., Beretta’s impeccably built Rinascimento (Renaissance) guns are now forever the property of the National Rifle Association and its members.

Review: Tract Response 2.5-10X 42 mm Riflescope

Lightweight and powerful, the Response from Tract Optics is a woodland-hunting optic with a palatable price-point that …

Thompson/Center Arms ENCORE PROHunter Returns

Thompson/Center Arms (T/C Arms) announced the return of its ENCORE PROHunter in April 2025, signaling yet another step forward in rebuilding the well-known firearm firm.

Heckler & Koch CC9: An H&K For The USA

Long respected for its world-leading military small arms, Heckler & Koch, through its American factory and engineers, has taken the pulse of U.S. shooters—and the new Concealed Carry 9 mm Luger micro pistol is poised to quicken it.

The Armed Citizen® May 5, 2025

Read today's "The Armed Citizen" entry for real stories of law-abiding citizens, past and present, who used their firearms to save lives.

Economic Impact Of The Gun Industry Continues To Grow

Despite a slight decline in demand for new firearms, the industry’s economic impact rose from $90.5 billion in 2023 to $91.7 billion in 2024.

Interests



Get the best of American Rifleman delivered to your inbox.