Independent field journal · Practice, evidence, judgmentIssue No. 01 / Summer 2026
KGKNOWN GROUNDClarity and capability in a contested world
Newsletter
Product record · Specifications checked July 23, 2026

FN 509 MRD

Factory MRD optic-ready configuration.

Editorial status

current

Research record; not firsthand tested.

Key facts

pistol

Weight: 27.02 oz
Dimensions: 7.4 in overall length; width and height not published
Compatibility: FN Low-Profile Optics-Mounting System

Typical price

Not listed

Prices may change.

No merchant links are currently listed.

Description

Factory MRD optic-ready configuration.

Specifications

Documented specifications for FN 509 MRD
FramePolymer
ActionStriker-fired DAO
SafetyInternal passive safeties; no manual safety
SightsFixed three-dot night sights
Caliber9 mm
Capacity10, 17, or 24 rounds
ControlsAmbidextrous slide stop and magazine release
Co-witnessFactory iron sights
Source scopeLaw-enforcement MRD configuration
Trigger pull5.5–7.5 lb
Barrel length4.0 in
Optics interfaceFN Low-Profile Optics-Mounting System

Sources and verification

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