FN 509D Duty MRD

The FN 509D Duty MRD delivers more precision and versatility than any other duty-rated handgun. The exclusive upgrades for law enforcement place every advantage in officers’ hands, with unmatched accuracy from a striker-fired handgun. 

Making up the new high-performance package are 3-dot tritium sights co-witness with the low profile MRD for maximum sighting versatility and a clean sight picture, day or night. With a polished feed ramp and chamber, consistent feeding and extraction exceeds every standard. The smooth, drop-safe, precision trigger and high-performance striker has a positive wall before a clean break, improving accuracy for all officers. With a target-crowned, hammer forged barrel, a lifetime of tight groups is in reach.

The 509D Duty MRD is the choice for agencies who can’t settle for less than 100% reliability. With unmatched longevity in the most demanding trials, the FN 509 platform has been tested beyond 1-million rounds.


9mm
CALIBER
 STRIKER
OPERATION
17
MAG CAPACITY
27 oz.
WEIGHT
4''
BARREL LENGHT
7.4''
OVERALL LENGHT
5.56''
HEIGHT
1.35''
WIDTH

SPECIFICATIONS

Patented FN Low-Profile Optics Mounting System fits most MRDs

Precision accuracy with unmatched sighting versatility

Quickly mount MRDs with the FN Low Profile Optics Mounting System™

3-dot tritium night sights co-witness to MRD, rear sight dovetail driftable

External extractor, loaded chamber visual indicator

4″ Target-crowned, hammer forged barrel for precision accuracy

Polished chamber and ramp for reliable feeding and extraction across ammunition types

Three interchangeable backstraps fit all hand sizes, improves sight recovery

Multi-surfaced texture for the perfect grip and faster follow up shots

Mil-Std 1913 rail fits all common weapon lights

Black 17-rd magazines, high-vis low-friction follower 

Three interchangeable backstraps

Three 17-round magazines

Four MRD mounting plates




OPERATION

Duty-rated trigger breaks cleanly at 90°

Superior ergonomics for maximum speed and control

Front and rear cocking serrations for clean slide manipulations

Drop-safe, duty-rated fire control group

Best-in-class flat-face trigger breaks cleanly at 90°

New, high-performance conical striker reduces trigger pull weight by ≈1-lbs.

4.5-lbs. to 6.0-lbs. trigger pull

Ambidextrous slide stop

Right-hand only magazine release

MAINTENANCE & WARANTY

Can be disassembled without pulling the trigger

PRODUCT VIDEOS