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 Tactical

Factory optic-ready tactical configuration.

Editorial status

current

Research record; not firsthand tested.

Key facts

pistol

Weight: 27.9 oz
Dimensions: 7.9 × 1.35 × 5.75 in
Compatibility: FN Low-Profile Optics-Mounting System

Typical price

Not listed

Prices may change.

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Description

Factory optic-ready tactical configuration.

Specifications

Documented specifications for FN 509 Tactical
FramePolymer
ActionStriker-fired DAO
SafetyInternal passive safeties; no manual safety
SightsSuppressor-height night sights
Caliber9 mm
Capacity17 or 24 rounds; 10-round configurations available
ControlsAmbidextrous slide stop and magazine release
Thread pitch1/2 × 28
Trigger pull5.5–7.5 lb
Barrel length4.5 in threaded
Accessory railMIL-STD-1913
Optics interfaceFN Low-Profile Optics-Mounting System

Sources and verification

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