Firearms

FN America FN 509 Midsize MRD 9mm 4-inch

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Specifications

About

Notable Variants

Aftermarket Ecosystem

Historically Significant Examples

Serial Number Data

Production data from factory records and collector research. Year ranges are approximate for pre-1968 firearms.

Years	Serial Range	Count	Factory	Country	Confidence

509 Midsize with optic-ready slide (MRD). Direct-mount red dot without adapter plate.

Type: Pistol

Action: Semi-Automatic

Caliber: 9mm

Capacity: 15

Year introduced: 2021, Belgium

Weight: 24.5 oz

Overall length: 7.4"

Status: Active

Intended use: Service, Competition